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  مهارات التفكير العليا

مهارات التفكير العليا

التكامل غير المحدود

(20) أكتشف الخطأ: أوجدت رنيم ناتج التكامل: begin mathsize 20px style integral left parenthesis 2 x plus 1 right parenthesis left parenthesis x minus 1 right parenthesis space d x end style، وكان حلها على النحو الآتي:

التكامل غير المحدود

أكتشف الخطأ في حل رنيم، ثم أصححه.

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 integral f left parenthesis x right parenthesis cross times g left parenthesis x right parenthesis space d x not equal to integral f left parenthesis x right parenthesis space d x cross times integral g left parenthesis x right parenthesis space d x end cell row blank cell integral left parenthesis 2 x plus 1 right parenthesis left parenthesis x minus 1 right parenthesis space d x equals integral left parenthesis 2 x squared minus 2 x plus x minus 1 right parenthesis space d x end cell row blank cell equals integral left parenthesis 2 x squared minus x minus 1 right parenthesis space d x end cell row blank cell equals 2 over 3 x cubed minus 1 half x squared minus x plus C end cell end table end style

 

تحدّ: أجد كل تكامل ممّا يأتي:

(21) begin mathsize 20px style integral left parenthesis fraction numerator x squared plus 1 over denominator x squared end fraction right parenthesis squared space d x 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 cell integral left parenthesis fraction numerator x squared plus 1 over denominator x squared end fraction right parenthesis squared d x end cell cell equals integral left parenthesis x squared over x squared plus 1 over x squared right parenthesis squared d x end cell row blank cell equals integral left parenthesis 1 plus x to the power of negative 2 end exponent right parenthesis to the power of 2 space end exponent d x end cell row blank cell equals integral left parenthesis 1 plus 2 x to the power of negative 2 end exponent plus x to the power of negative 4 end exponent right parenthesis space d x end cell row blank cell equals x minus 2 x to the power of negative 1 end exponent minus 1 third x to the power of negative 3 end exponent plus C equals x minus 2 over x minus fraction numerator 1 over denominator 3 x cubed end fraction plus C end cell end table end style

(22) begin mathsize 20px style integral left parenthesis x minus 1 right parenthesis left parenthesis x minus 3 right parenthesis left parenthesis x plus 5 right parenthesis space d x 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 cell integral left parenthesis x minus 1 right parenthesis left parenthesis x minus 3 right parenthesis left parenthesis x plus 5 right parenthesis space d x end cell cell equals integral left parenthesis x squared minus 3 x minus x plus 3 right parenthesis left parenthesis x plus 5 right parenthesis space d x end cell row blank cell equals integral left parenthesis x squared minus 4 x plus 3 right parenthesis left parenthesis x plus 5 right parenthesis space d x end cell row blank cell equals integral left parenthesis x cubed plus 5 x squared minus 4 x squared minus 20 x plus 3 x plus 15 right parenthesis space d x end cell row blank cell equals integral left parenthesis x cubed plus x squared minus 17 x plus 15 right parenthesis space d x end cell row blank cell equals 1 fourth x to the power of 4 plus 1 third x cubed minus 17 over 2 x squared plus 15 x plus C end cell end table end style

 

(23) تبرير: إذا كان: begin mathsize 20px style integral left parenthesis fraction numerator P over denominator 2 x squared end fraction plus Q right parenthesis space d x equals 2 over x plus 10 x plus C end style ، فأجد قيمة كلّ من الثابت P ، والثابت Q ، مبرراً إجابتي.  

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 integral left parenthesis fraction numerator P over denominator 2 x squared end fraction plus Q right parenthesis space d x equals 2 over x plus 10 x plus C 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 integral left parenthesis fraction numerator P over denominator 2 x squared end fraction plus Q right parenthesis space d x end cell cell equals integral left parenthesis P over 2 x to the power of negative 2 end exponent plus Q right parenthesis space d x end cell row blank cell equals negative P over 2 x to the power of negative 1 end exponent plus Q x plus C end cell row blank cell equals negative fraction numerator P over denominator 2 x end fraction plus Q x plus C end cell row cell space not stretchy rightwards double arrow negative P over 2 equals 2 space of 1em comma space Q end cell cell equals 10 end cell row cell not stretchy rightwards double arrow P equals negative 4 space of 1em g Q end cell cell equals 10 end cell end table end cell end table end style

إعداد : شبكة منهاجي التعليمية

09 / 02 / 2023

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