حمّل تطبيق منهاجي الجديد

منهاجي صار أسرع من خلال التطبيق

  أتدرب وأحل المسائل

أتدرب وأحل المسائل

المتجهات في الفضاء

أعيّن كلاً من النقاط الآتية في نظام الإحداثيات ثلاثي الأبعاد:

begin mathsize 20px style left parenthesis 4 comma 5 comma 3 right parenthesis end style (1)

حل 1

begin mathsize 20px style left parenthesis negative 2 comma 3 comma negative 5 right parenthesis end style (2)

حل 2

begin mathsize 20px style left parenthesis 4 comma 0 comma negative 3 right parenthesis end style (3)

حل 3

أجد الطول وإحداثيات نقطة المنتصف للقطعة المستقيمة التي أعطي طرفاها في كل مما يأتي:

begin mathsize 20px style left parenthesis 3 comma negative 2 comma 8 right parenthesis comma left parenthesis 5 comma 4 comma 2 right parenthesis end style (4)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell A left parenthesis 3 comma negative 2 comma 8 right parenthesis comma B left parenthesis 5 comma 4 comma 2 right parenthesis end cell row blank cell A B equals square root of left parenthesis x subscript 2 minus x subscript 1 right parenthesis squared plus left parenthesis y subscript 2 minus y subscript 1 right parenthesis squared plus left parenthesis z subscript 2 minus z subscript 1 right parenthesis squared end root end cell row blank cell equals square root of 2 squared plus 6 squared plus left parenthesis negative 6 right parenthesis squared end root equals square root of 76 equals 2 square root of 19 end cell row blank cell N equals left parenthesis fraction numerator x subscript 1 plus x subscript 2 over denominator 2 end fraction comma fraction numerator y subscript 1 plus y subscript 2 over denominator 2 end fraction comma fraction numerator z subscript 1 plus z subscript 2 over denominator 2 end fraction right parenthesis equals left parenthesis fraction numerator 3 plus 5 over denominator 2 end fraction comma fraction numerator negative 2 plus 4 over denominator 2 end fraction comma fraction numerator 8 plus 2 over denominator 2 end fraction right parenthesis equals left parenthesis 4 comma 1 comma 5 right parenthesis end cell end table end style

begin mathsize 20px style left parenthesis negative 2 comma 7 comma 0 right parenthesis comma left parenthesis 2 comma negative 5 comma 3 right parenthesis end style (5)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell A left parenthesis negative 2 comma 7 comma 0 right parenthesis comma B left parenthesis 2 comma negative 5 comma 3 right parenthesis end cell row blank cell table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell A B end cell cell equals square root of left parenthesis x subscript 2 minus x subscript 1 right parenthesis squared plus left parenthesis y subscript 2 minus y subscript 1 right parenthesis squared plus left parenthesis z subscript 2 minus z subscript 1 right parenthesis squared end root end cell row blank cell equals square root of 16 plus 144 plus 9 end root equals square root of 169 equals 13 end cell row blank cell N equals left parenthesis fraction numerator x subscript 1 plus x subscript 2 over denominator 2 end fraction comma fraction numerator y subscript 1 plus y subscript 2 over denominator 2 end fraction comma fraction numerator z subscript 1 plus z subscript 2 over denominator 2 end fraction right parenthesis equals left parenthesis fraction numerator negative 2 plus 2 over denominator 2 end fraction comma fraction numerator 7 minus 5 over denominator 2 end fraction comma fraction numerator 0 plus 3 over denominator 2 end fraction right parenthesis equals left parenthesis 0 comma 1 comma 3 over 2 right parenthesis end cell end table end cell end table end style

begin mathsize 20px style left parenthesis 12 comma 8 comma negative 5 right parenthesis comma left parenthesis negative 3 comma 6 comma 7 right parenthesis end style (6)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell A left parenthesis 12 comma 8 comma negative 5 right parenthesis comma B left parenthesis negative 3 comma 6 comma 7 right parenthesis end cell row blank cell table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell A B end cell cell equals square root of left parenthesis x subscript 2 minus x subscript 1 right parenthesis squared plus left parenthesis y subscript 2 minus y subscript 1 right parenthesis squared plus left parenthesis z subscript 2 minus z subscript 1 right parenthesis squared end root end cell row blank cell equals square root of 225 plus 4 plus 144 end root equals square root of 373 end cell row blank cell N equals left parenthesis fraction numerator x subscript 1 plus x subscript 2 over denominator 2 end fraction comma fraction numerator y subscript 1 plus y subscript 2 over denominator 2 end fraction comma fraction numerator z subscript 1 plus z subscript 2 over denominator 2 end fraction right parenthesis equals left parenthesis fraction numerator 12 minus 3 over denominator 2 end fraction comma fraction numerator 8 plus 6 over denominator 2 end fraction comma fraction numerator negative 5 plus 7 over denominator 2 end fraction right parenthesis equals left parenthesis 9 over 2 comma 7 comma 1 right parenthesis end cell end table end cell end table end style

begin mathsize 20px style left parenthesis negative 5 comma negative 8 comma 4 right parenthesis comma left parenthesis 3 comma 2 comma negative 6 right parenthesis end style (7)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell A left parenthesis negative 5 comma negative 8 comma 4 right parenthesis comma B left parenthesis 3 comma 2 comma negative 6 right parenthesis end cell row blank cell table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell A B end cell cell equals square root of left parenthesis x subscript 2 minus x subscript 1 right parenthesis squared plus left parenthesis y subscript 2 minus y subscript 1 right parenthesis squared plus left parenthesis z subscript 2 minus z subscript 1 right parenthesis squared end root end cell row blank cell equals square root of 64 plus 100 plus 100 end root equals square root of 264 equals 2 square root of 66 end cell row blank cell table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row N cell equals left parenthesis fraction numerator x subscript 1 plus x subscript 2 over denominator 2 end fraction comma fraction numerator y subscript 1 plus y subscript 2 over denominator 2 end fraction comma fraction numerator z subscript 1 plus z subscript 2 over denominator 2 end fraction right parenthesis equals left parenthesis fraction numerator negative 5 plus 3 over denominator 2 end fraction comma fraction numerator negative 8 plus 2 over denominator 2 end fraction comma fraction numerator 4 minus 6 over denominator 2 end fraction right parenthesis end cell row blank cell equals left parenthesis negative 1 comma negative 3 comma negative 1 right parenthesis end cell end table end cell end table end cell end table end style

أمثل كلاً من المتجهات الآتية بيانياً في الفضاء:

 begin mathsize 20px style straight v with rightwards arrow on top equals not stretchy left angle bracket minus 3 comma negative 4 comma 5 not stretchy right angle bracket end style (8)

حل 8

begin mathsize 20px style straight m with rightwards arrow on top equals not stretchy left angle bracket 2 comma negative 3 comma negative 4 not stretchy right angle bracket end style (9)

حل 9

begin mathsize 20px style straight p with rightwards arrow on top equals not stretchy left angle bracket minus 3 comma 5 comma negative 2 not stretchy right angle bracket end style (10)

حل 10

begin mathsize 20px style straight e with rightwards arrow on top equals negative 5 straight i with not stretchy hat on top plus 3 straight j with not stretchy hat on top plus 4 straight k with not stretchy hat on top end style (11)

حل 11

begin mathsize 20px style stack A B with rightwards arrow on top colon A left parenthesis 4 comma 1 comma 1 right parenthesis comma B left parenthesis negative 3 comma 6 comma 3 right parenthesis end style (12)

حل 12

begin mathsize 20px style stack G H with rightwards arrow on top colon G left parenthesis 1 comma negative 3 comma 5 right parenthesis comma H left parenthesis 0 comma 4 comma negative 2 right parenthesis end style (13)

حل 13

أجد الصورة الإحداثية والمقدار للمتجه begin mathsize 20px style stack bold A bold B with bold rightwards arrow on top end style الذي أعطيت نقطة بدايته ونقطة نهايته في كل مما يأتي:

begin mathsize 20px style A left parenthesis 4 comma 6 comma 9 right parenthesis comma B left parenthesis negative 3 comma 2 comma 5 right parenthesis end style (14)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell stack A B with rightwards arrow on top equals not stretchy left angle bracket minus 3 minus 4 comma 2 minus 6 comma 5 minus 9 not stretchy right angle bracket equals not stretchy left angle bracket minus 7 comma negative 4 comma negative 4 not stretchy right angle bracket end cell row blank cell vertical line stack A B with rightwards arrow on top vertical line equals square root of v subscript 1 superscript 2 plus v subscript 2 superscript 2 plus v subscript 3 superscript 2 end root equals square root of 49 plus 16 plus 16 end root equals square root of 81 equals 9 end cell end table end style

begin mathsize 20px style A left parenthesis negative 8 comma 5 comma 7 right parenthesis comma B left parenthesis 6 comma 3 comma 2 right parenthesis end style (15)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell stack A B with rightwards arrow on top equals not stretchy left angle bracket 6 minus left parenthesis negative 8 right parenthesis comma 3 minus 5 comma 2 minus 7 not stretchy right angle bracket equals not stretchy left angle bracket 14 comma negative 2 comma negative 5 not stretchy right angle bracket end cell row blank cell vertical line stack A B with rightwards arrow on top vertical line equals square root of v subscript 1 superscript 2 plus v subscript 2 superscript 2 plus v subscript 3 superscript 2 end root equals square root of 196 plus 4 plus 25 end root equals square root of 225 equals 15 end cell end table end style

begin mathsize 20px style A left parenthesis 12 comma negative 5 comma 4 right parenthesis comma B left parenthesis 4 comma 1 comma negative 1 right parenthesis end style (16)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell stack A B with rightwards arrow on top equals not stretchy left angle bracket 4 minus 12 comma 1 minus left parenthesis negative 5 right parenthesis comma negative 1 minus 4 not stretchy right angle bracket equals not stretchy left angle bracket minus 8 comma 6 comma negative 5 not stretchy right angle bracket end cell row blank cell vertical line stack A B with rightwards arrow on top vertical line equals square root of v subscript 1 superscript 2 plus v subscript 2 superscript 2 plus v subscript 3 superscript 2 end root equals square root of 64 plus 36 plus 25 end root equals square root of 125 equals 5 square root of 5 end cell end table end style

begin mathsize 20px style A left parenthesis 24 comma negative 8 comma 10 right parenthesis comma B left parenthesis 10 comma 6 comma 3 right parenthesis end style (17)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell stack A B with rightwards arrow on top equals not stretchy left angle bracket 10 minus 24 comma 6 minus left parenthesis negative 8 right parenthesis comma 3 minus 10 not stretchy right angle bracket equals not stretchy left angle bracket minus 14 comma 14 comma negative 7 not stretchy right angle bracket end cell row blank cell vertical line stack A B with rightwards arrow on top vertical line equals square root of v subscript 1 superscript 2 plus v subscript 2 superscript 2 plus v subscript 3 superscript 2 end root equals square root of 196 plus 196 plus 49 end root equals square root of 441 equals 21 end cell end table end style

(18) إذا كان OAB مثلثاً فيه: begin mathsize 20px style stack A B with rightwards arrow on top equals straight b with rightwards arrow on top comma stack O A with rightwards arrow on top equals straight a with rightwards arrow on top end style، والنقطة C هي منتصف begin mathsize 20px style stack A B with rightwards arrow on top end style، فأكتب المتجه begin mathsize 20px style stack O C with rightwards arrow on top end style بدلالة begin mathsize 20px style straight a with rightwards arrow on top end style وbegin mathsize 20px style b with rightwards arrow on top end style.

Error converting from MathML to accessible text.

إذا كان: Error converting from MathML to accessible text.، فأجد كلاً مما يأتي:

begin mathsize 20px style 3 straight e with rightwards arrow on top plus 4 straight f with rightwards arrow on top end style (19)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell 3 straight e with rightwards arrow on top plus 4 straight f with rightwards arrow on top end cell cell equals 3 not stretchy left angle bracket minus 3 comma 9 comma negative 4 not stretchy right angle bracket plus 4 not stretchy left angle bracket 5 comma negative 3 comma 7 not stretchy right angle bracket equals not stretchy left angle bracket minus 9 comma 27 comma negative 12 not stretchy right angle bracket plus not stretchy left angle bracket 20 comma negative 12 comma 28 not stretchy right angle bracket end cell row blank cell equals not stretchy left angle bracket 11 comma 15 comma 16 not stretchy right angle bracket end cell end table end style

begin mathsize 20px style straight e with rightwards arrow on top plus straight f with rightwards arrow on top minus 3 straight g with rightwards arrow on top end style (20)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell straight e with rightwards arrow on top plus straight f with rightwards arrow on top minus 3 straight g with rightwards arrow on top end cell cell equals not stretchy left angle bracket minus 3 comma 9 comma negative 4 not stretchy right angle bracket plus not stretchy left angle bracket 5 comma negative 3 comma 7 not stretchy right angle bracket minus 3 not stretchy left angle bracket minus 1 comma 8 comma negative 5 not stretchy right angle bracket end cell row blank cell equals not stretchy left angle bracket 5 comma negative 18 comma 18 not stretchy right angle bracket end cell end table end style

begin mathsize 20px style 4 straight e with rightwards arrow on top minus 2 straight f with rightwards arrow on top plus 3 straight g with rightwards arrow on top end style (21)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell 4 straight e with rightwards arrow on top minus 2 straight f with rightwards arrow on top plus 3 straight g with rightwards arrow on top end cell cell equals 4 not stretchy left angle bracket minus 3 comma 9 comma negative 4 not stretchy right angle bracket minus 2 not stretchy left angle bracket 5 comma negative 3 comma 7 not stretchy right angle bracket plus 3 not stretchy left angle bracket minus 1 comma 8 comma negative 5 not stretchy right angle bracket end cell row blank cell equals not stretchy left angle bracket minus 25 comma 66 comma negative 45 not stretchy right angle bracket end cell end table end style

begin mathsize 20px style 2 straight e with rightwards arrow on top plus 7 straight f with rightwards arrow on top minus 2 straight g with rightwards arrow on top end style (22)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row cell 2 straight e with rightwards arrow on top plus 7 straight f with rightwards arrow on top minus 2 straight g with rightwards arrow on top end cell cell equals 2 not stretchy left angle bracket minus 3 comma 9 comma negative 4 not stretchy right angle bracket plus 7 not stretchy left angle bracket 5 comma negative 3 comma 7 not stretchy right angle bracket minus 2 not stretchy left angle bracket minus 1 comma 8 comma negative 5 not stretchy right angle bracket end cell row blank cell equals not stretchy left angle bracket 31 comma negative 19 comma 51 not stretchy right angle bracket end cell end table end style

إذا كانت: begin mathsize 20px style bold italic A bold left parenthesis bold minus bold 1 bold comma bold 6 bold comma bold 5 bold right parenthesis bold comma bold italic B bold left parenthesis bold 0 bold comma bold 1 bold comma bold minus bold 4 bold right parenthesis bold comma bold italic C bold left parenthesis bold 2 bold comma bold 1 bold comma bold 1 bold right parenthesis end style نقاطاً في الفضاء، فأجد كلاً مما يأتي:

(23) متجه موقع كل من النقاط: A وB وC.

begin mathsize 20px style stack O A with rightwards arrow on top equals not stretchy left angle bracket minus 1 comma 6 comma 5 not stretchy right angle bracket comma space of 1em stack O B with rightwards arrow on top equals not stretchy left angle bracket 0 comma 1 comma negative 4 not stretchy right angle bracket comma space of 1em stack O C with rightwards arrow on top equals not stretchy left angle bracket 2 comma 1 comma 1 not stretchy right angle bracket end style

(24) متجه الإزاحة من النقطة B إلى النقطة A.

begin mathsize 20px style stack B A with rightwards arrow on top equals stack O A with rightwards arrow on top minus stack O B with rightwards arrow on top equals not stretchy left angle bracket minus 1 comma 6 comma 5 not stretchy right angle bracket minus not stretchy left angle bracket 0 comma 1 comma negative 4 not stretchy right angle bracket equals not stretchy left angle bracket minus 1 comma 5 comma 9 not stretchy right angle bracket end style

(25) متجه الإزاحة من النقطة C إلى النقطة B.

begin mathsize 20px style stack C B with rightwards arrow on top equals stack O B with rightwards arrow on top minus stack O C with rightwards arrow on top equals not stretchy left angle bracket 0 comma 1 comma negative 4 not stretchy right angle bracket minus not stretchy left angle bracket 2 comma 1 comma 1 not stretchy right angle bracket equals not stretchy left angle bracket minus 2 comma 0 comma negative 5 not stretchy right angle bracket end style

(26) المسافة بين النقطة C والنقطة B.

begin mathsize 20px style vertical line stack B C with rightwards arrow on top vertical line equals square root of v subscript 1 superscript 2 plus v subscript 2 superscript 2 plus v subscript 3 superscript 2 end root equals square root of 4 plus 0 plus 25 end root equals square root of 29 end style

أكتب كلاً من المتجهات الآنية بدلالة متجهات الوحدة الأساسية:

begin mathsize 20px style straight g with rightwards arrow on top equals not stretchy left angle bracket 5 comma 7 comma negative 1 not stretchy right angle bracket end style (27)

begin mathsize 20px style straight g with rightwards arrow on top equals 5 straight i with not stretchy hat on top plus 7 ȷ with not stretchy hat on top minus straight k with not stretchy hat on top end styl

begin mathsize 20px style stack S T with rightwards arrow on top colon S left parenthesis 1 comma 0 comma negative 5 right parenthesis comma T left parenthesis 2 comma negative 2 comma 0 right parenthesis end style (28)

begin mathsize 20px style stack S T with rightwards arrow on top equals left parenthesis 2 minus 1 right parenthesis straight i with not stretchy hat on top plus left parenthesis negative 2 minus 0 right parenthesis ȷ with not stretchy hat on top plus left parenthesis 0 minus left parenthesis negative 5 right parenthesis right parenthesis straight k with not stretchy hat on top equals ı with not stretchy hat on top minus 2 ȷ with not stretchy hat on top plus 5 straight k with not stretchy hat on top end st

begin mathsize 20px style negative straight a with rightwards arrow on top plus 3 straight b with rightwards arrow on top colon straight a with rightwards arrow on top equals 1 straight i with not stretchy hat on top plus 2 straight j with not stretchy hat on top minus 4 straight k with not stretchy hat on top comma straight b with rightwards arrow on top equals 4 straight i with not stretchy hat on top minus 3 straight j with not stretchy hat on top plus 5 straight k with not stretchy hat on top end style (29)

begin mathsize 20px style negative straight a with rightwards arrow on top plus 3 straight b with rightwards arrow on top equals negative straight i with not stretchy hat on top minus 2 straight j with not stretchy hat on top plus 4 straight k with not stretchy hat on top plus 12 straight i with not stretchy hat on top minus 9 ȷ with not stretchy hat on top plus 15 straight k with not stretchy hat on top equals 11 straight i with not stretchy hat on top minus 11 ȷ with not stretchy hat on top plus 19 straight k with not stretchy hat on top end sty

أجد متجه وحدة في اتجاه كل متجه مما يأتي:

begin mathsize 20px style negative 4 straight i with not stretchy hat on top plus 3 straight j with not stretchy hat on top end style (30)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell straight v with rightwards arrow on top equals negative 4 straight i with not stretchy hat on top plus 3 ȷ with not stretchy hat on top end cell row blank cell vertical line straight v with rightwards arrow on top vertical line equals square root of 16 plus 9 end root equals 5 end cell row blank cell straight v with not stretchy hat on top equals 1 fifth straight v with rightwards arrow on top equals fraction numerator negative 4 over denominator 5 end fraction straight i with not stretchy hat on top plus 3 over 5 ȷ with not stretchy hat on top end cell end table end sty

وهذا هو متجه الوحدة في اتجاه begin mathsize 20px style straight v with rightwards arrow on top end style

begin mathsize 20px style 143 straight i with not stretchy hat on top minus 24 straight j with not stretchy hat on top end style (31)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell straight v with rightwards arrow on top equals 143 straight i with not stretchy hat on top minus 24 ȷ with not stretchy hat on top end cell row blank cell vertical line straight v with rightwards arrow on top vertical line equals square root of 20449 plus 576 end root equals square root of 21025 equals 145 end cell row blank cell straight v with not stretchy hat on top equals 1 over 145 straight v with rightwards arrow on top equals 143 over 145 straight i with not stretchy hat on top minus 24 over 145 ı with not stretchy hat on top end cell end table end sty

وهذا هو متجه الوحدة في اتجاه begin mathsize 20px style straight v with rightwards arrow on top end style

begin mathsize 20px style negative 72 straight i with not stretchy hat on top plus 33 straight j with not stretchy hat on top plus 56 straight k with not stretchy hat on top end style (32)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell straight v with rightwards arrow on top equals negative 72 straight i with not stretchy hat on top plus 33 ȷ with not stretchy hat on top plus 56 straight k with not stretchy hat on top end cell row blank cell vertical line straight v with rightwards arrow on top vertical line equals square root of 5184 plus 1089 plus 3136 end root equals square root of 9409 equals 97 end cell row blank cell straight v with not stretchy hat on top equals 1 over 97 straight v with rightwards arrow on top equals fraction numerator negative 72 over denominator 97 end fraction straight i with not stretchy hat on top plus 33 over 97 ı with not stretchy hat on top plus 56 over 97 straight k with not stretchy hat on top end cell end table end sty

وهذا هو متجه الوحدة في اتجاه begin mathsize 20px style straight v with rightwards arrow on top end style

begin mathsize 20px style left parenthesis table attributes columnspacing 1em end attributes row 11 row 13 row 8 end table right parenthesis end style (33)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell straight v with rightwards arrow on top equals left parenthesis table attributes columnalign center columnspacing 1em end attributes row 11 row 13 row 8 end table right parenthesis end cell row blank cell vertical line straight v with rightwards arrow on top vertical line equals square root of 121 plus 169 plus 64 end root equals square root of 354 end cell row blank cell straight v with not stretchy hat on top equals fraction numerator 1 over denominator square root of 354 end fraction straight v with rightwards arrow on top equals left parenthesis table attributes columnalign center columnspacing 1em end attributes row cell fraction numerator 11 over denominator square root of 354 end fraction end cell row cell fraction numerator 13 over denominator square root of 354 end fraction end cell row cell fraction numerator 8 over denominator square root of 354 end fraction end cell end table right parenthesis end cell end table end style

وهذا هو متجه الوحدة في اتجاه begin mathsize 20px style straight v with rightwards arrow on top end style

begin mathsize 20px style left parenthesis table attributes columnspacing 1em end attributes row 5 row cell negative 4 end cell row cell negative 2 end cell end table right parenthesis end style (34)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell straight v with rightwards arrow on top equals left parenthesis table attributes columnalign center columnspacing 1em end attributes row 5 row cell negative 4 end cell row cell negative 2 end cell end table right parenthesis end cell row blank cell vertical line straight v with rightwards arrow on top vertical line equals square root of 25 plus 16 plus 4 end root equals square root of 45 equals 3 square root of 5 end cell row blank cell straight v with not stretchy hat on top equals fraction numerator 1 over denominator 3 square root of 5 end fraction straight v with rightwards arrow on top equals left parenthesis table attributes columnalign center columnspacing 1em end attributes row cell fraction numerator 5 over denominator 3 square root of 5 end fraction end cell row cell fraction numerator negative 4 over denominator 3 square root of 5 end fraction end cell row cell fraction numerator negative 2 over denominator 3 square root of 5 end fraction end cell end table right parenthesis end cell end table end style

وهذا هو متجه الوحدة في اتجاه begin mathsize 20px style straight v with rightwards arrow on top end style

begin mathsize 20px style straight n with rightwards arrow on top equals not stretchy left angle bracket minus 2 comma 0 comma 3 not stretchy right angle bracket end style (35)

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell straight n with rightwards arrow on top equals not stretchy left angle bracket minus 2 comma 0 comma 3 not stretchy right angle bracket end cell row blank cell vertical line straight n with rightwards arrow on top vertical line equals square root of 4 plus 0 plus 9 end root equals square root of 13 end cell row blank cell straight n with hat on top equals fraction numerator 1 over denominator square root of 13 end fraction straight n with rightwards arrow on top equals left angle bracket fraction numerator negative 2 over denominator square root of 13 end fraction comma 0 comma fraction numerator 3 over denominator square root of 13 end fraction right angle bracket end cell end table end style

وهذا هو متجه الوحدة في اتجاه begin mathsize 20px style n with rightwards arrow on top end style

(36) إذا كان: begin mathsize 20px style straight a with rightwards arrow on top equals negative 3 straight i with not stretchy hat on top plus 4 straight j with not stretchy hat on top plus 12 straight k with not stretchy hat on top comma straight b with rightwards arrow on top equals 7 straight i with not stretchy hat on top plus 39 straight j with not stretchy hat on top minus 2 straight k with not stretchy hat on top end style، وكان: begin mathsize 20px style 3 straight a with rightwards arrow on top plus c straight b with rightwards arrow on top equals negative 23 straight i with not stretchy hat on top minus 66 straight j with not stretchy hat on top plus 40 straight k with not stretchy hat on top end style، فأجد قيمة c.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell 3 straight a with rightwards arrow on top plus c straight b with rightwards arrow on top equals 3 left parenthesis negative 3 straight i with not stretchy hat on top plus 4 ȷ with not stretchy hat on top plus 12 straight k with not stretchy hat on top right parenthesis plus c left parenthesis 7 straight i with not stretchy hat on top plus 39 straight j with not stretchy hat on top minus 2 straight k with not stretchy hat on top right parenthesis end cell row blank cell equals left parenthesis negative 9 plus 7 c right parenthesis straight i with not stretchy hat on top plus left parenthesis 12 plus 39 c right parenthesis ȷ with not stretchy hat on top plus left parenthesis 36 minus 2 c right parenthesis straight k with not stretchy hat on top right parenthesis end cell row blank cell not stretchy rightwards double arrow negative 23 straight i with not stretchy hat on top minus 66 straight j with not stretchy hat on top plus 40 straight k with not stretchy hat on top equals left parenthesis negative 9 plus 7 c right parenthesis ı with not stretchy hat on top plus left parenthesis 12 plus 39 c right parenthesis ȷ with not stretchy hat on top plus left parenthesis 36 minus 2 c right parenthesis straight k with not stretchy hat on top right parenthesis end cell end table end s

في هذاه المعادلة يتساوى المتجهان، إذن، فإن إحداثياتهما المتناظرة متساوية:

begin mathsize 20px style negative 9 plus 7 c equals negative 23 comma 12 plus 39 c equals negative 66 comma 36 minus 2 c equals 40 straight pi end style

وعند حل هذه المعادلات نجد أن لها الحل نفسه begin mathsize 20px style c equals negative 2 end style

(37) إذا كان: begin mathsize 20px style straight s with rightwards arrow on top equals left parenthesis table attributes columnspacing 1em end attributes row 2 row cell w plus 47 end cell row cell negative 4 end cell end table right parenthesis comma straight t with rightwards arrow on top equals left parenthesis table attributes columnalign left columnspacing 1em end attributes row 3 row v row 2 end table right parenthesis colon end style، وكان: begin mathsize 20px style k straight s with rightwards arrow on top minus 4 straight t with rightwards arrow on top equals left parenthesis table attributes columnspacing 1em end attributes row 6 row 31 row w end table right parenthesis end style، فأجد قيمة كل من v وw وk.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell k straight s with rightwards arrow on top minus 4 straight t with rightwards arrow on top equals k left parenthesis table attributes columnalign center columnspacing 1em end attributes row 2 row cell w plus 47 end cell row cell negative 4 end cell end table right parenthesis minus 4 left parenthesis table attributes columnspacing 1em end attributes row 3 row v row 2 end table right parenthesis end cell row blank cell equals left parenthesis table attributes columnalign center columnspacing 1em end attributes row cell 2 k minus 12 end cell row cell k left parenthesis w plus 47 right parenthesis minus 4 v end cell row cell negative 4 k minus 8 end cell end table right parenthesis end cell row blank cell not stretchy rightwards double arrow left parenthesis table attributes columnalign center columnspacing 1em end attributes row 6 row 31 row w end table right parenthesis equals left parenthesis table attributes columnalign center columnspacing 1em end attributes row cell 2 k minus 12 end cell row cell k left parenthesis w plus 47 right parenthesis minus 4 v end cell row cell negative 4 k minus 8 end cell end table right parenthesis end cell row blank cell not stretchy rightwards double arrow 2 k minus 12 equals 6 not stretchy rightwards double arrow k equals 9 end cell row blank cell negative 4 k minus 8 equals w space of 1em not stretchy rightwards double arrow w equals negative 36 minus 8 equals negative 44 end cell row blank cell k left parenthesis w plus 47 right parenthesis minus 4 v equals 31 not stretchy rightwards double arrow 9 left parenthesis negative 44 plus 47 right parenthesis minus 4 v equals 31 not stretchy rightwards double arrow v equals negative 1 end cell end table end style

(38) إذا كان: begin mathsize 20px style straight m with rightwards arrow on top equals not stretchy left angle bracket 4 comma 1 comma negative 2 not stretchy right angle bracket comma straight n with rightwards arrow on top equals not stretchy left angle bracket 6 comma 2 comma negative 3 not stretchy right angle bracket comma straight p with rightwards arrow on top equals not stretchy left angle bracket 2 comma a comma negative 1 not stretchy right angle bracket comma 5 straight m with rightwards arrow on top plus 2 straight p with rightwards arrow on top equals 4 straight n with rightwards arrow on top end style، فما قيمة الثابت a؟

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell 5 straight m with rightwards arrow on top plus 2 straight p with rightwards arrow on top equals 4 straight n with rightwards arrow on top end cell row blank cell 5 not stretchy left angle bracket 4 comma 1 comma negative 2 not stretchy right angle bracket plus 2 not stretchy left angle bracket 2 comma a comma negative 1 not stretchy right angle bracket equals 4 not stretchy left angle bracket 6 comma 2 comma negative 3 not stretchy right angle bracket end cell row blank cell not stretchy left angle bracket 24 comma 5 plus 2 a comma negative 12 not stretchy right angle bracket equals not stretchy left angle bracket 24 comma 8 comma negative 12 not stretchy right angle bracket end cell end table end style

في هذه المعادلة يتساوى المتجهان، إذن، فإن إحداثياتهما المتناظرة متساوية:

begin mathsize 20px style 5 plus 2 a equals 8 not stretchy rightwards double arrow a equals 3 over 2 end style

(39) إذا كان: begin mathsize 20px style straight v with rightwards arrow on top equals not stretchy left angle bracket u minus 3 comma u plus 1 comma u minus 2 not stretchy right angle bracket end style، وكان: begin mathsize 20px style vertical line straight v with rightwards arrow on top vertical line equals 17 end style، فما قيمة u ؟

begin mathsize 20px style vertical line bold v with rightwards arrow on top vertical line equals square root of v subscript 1 superscript 2 plus v subscript 2 superscript 2 plus v subscript 3 superscript 2 end root equals square root of left parenthesis u minus 3 right parenthesis squared plus left parenthesis u plus 1 right parenthesis squared plus left parenthesis u minus 2 right parenthesis squared end root equals 17 space open parentheses الأقواس space وفك space الطرفين space بتر�
�ع close parentheses\ntable attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell u squared minus 6 u plus 9 plus u squared plus 2 u plus 1 plus u squared minus 4 u plus 4 equals 289 end cell row blank cell 3 u squared minus 8 u minus 275 equals 0 end cell row blank cell u equals fraction numerator 8 plus-or-minus square root of 3364 over denominator 2 left parenthesis 3 right parenthesis end fraction equals fraction numerator 8 plus-or-minus 58 over denominator 6 end fraction end cell row blank cell u equals fraction numerator negative 50 over denominator 6 end fraction equals fraction numerator negative 25 over denominator 3 end fraction space أو space u equals 66 over 6 equals 11 end

(40) إذا كان متجها الموقع للنقطة G والنقطة H هما: begin mathsize 20px style straight g with rightwards arrow on top equals not stretchy left angle bracket minus 2 comma c plus 1 comma negative 8 not stretchy right angle bracket end style وbegin mathsize 20px style straight h with rightwards arrow on top equals not stretchy left angle bracket c minus 1 comma negative 4 comma c plus 2 not stretchy right angle bracket end style، على الترتيب، فأجد قيمة c، علماً بأن: begin mathsize 20px style vertical line stack G H with rightwards arrow on top vertical line equals 19 end style، وأن: begin mathsize 20px style c greater than 0 end style.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell stack G H with rightwards arrow on top equals not stretchy left angle bracket c minus 1 minus left parenthesis negative 2 right parenthesis comma negative 4 minus left parenthesis c plus 1 right parenthesis comma c plus 2 minus left parenthesis negative 8 right parenthesis not stretchy right angle bracket equals not stretchy left angle bracket c plus 1 comma negative 5 minus c comma c plus 10 not stretchy right angle bracket end cell row blank cell vertical line stack G H with rightwards arrow on top vertical line equals square root of left parenthesis c plus 1 right parenthesis squared plus left parenthesis negative 5 minus c right parenthesis squared plus left parenthesis c plus 10 right parenthesis squared end root equals 19 space open parentheses الأقواس space وفك space الطرفين space بتربيع close parenth
es end cell end table\ntable attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell c squared plus 2 c plus 1 plus 25 plus 10 c plus c squared plus c squared plus 20 c plus 100 equals 361 end cell row blank cell not stretchy rightwards double arrow 3 c squared plus 32 c minus 235 equals 0 end cell row blank cell not stretchy rightwards double arrow c equals fraction numerator negative 32 plus-or-minus square root of 3844 over denominator 6 end fraction equals fraction numerator negative 32 plus-or-minus 62 over denominator 6 end frac
on end cell end table\nc equals fraction numerator negative 94 over denominator 6 end fraction equals fraction numerator negative 47 over denominator 3 end fraction space أو space c equals 30

ولكن begin mathsize 20px style c greater than 0 end style إذن، begin mathsize 20px style c equals 5 end style

إعداد : شبكة منهاجي التعليمية

10 / 07 / 2023

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