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التفاضل

كتابة المقدار الجبري في أبسط صورة

أجد ناتج ضرب كل مما يأتي في أبسط صورة:

(1) 2x(x – 4)

begin mathsize 20px style 2 x left parenthesis x minus 4 right parenthesis equals 2 x squared minus 8 x end style

(2) (x + 4)(x – 5)

begin mathsize 20px style left parenthesis x plus 4 right parenthesis left parenthesis x minus 5 right parenthesis equals x squared minus 5 x plus 4 x minus 20 equals x squared minus x minus 20 end style

(3) (3x + 1)2

begin mathsize 20px style left parenthesis 3 x plus 1 right parenthesis squared equals 9 x squared plus 6 x plus 1 end style

 

التحويل من الصيغة الجذرية إلى الصيغة الأسيّة

أحوّل كلاً مما يأتي من الصيغة الجذرية إلى الصيغة الأسيّة:

(4) begin mathsize 20px style fifth root of x to the power of 4 end root end style

begin mathsize 20px style fifth root of x to the power of 4 end root equals x to the power of 4 over 5 end exponent end style

(5) begin mathsize 20px style cube root of x end style

begin mathsize 20px style cube root of x equals x to the power of 1 third end exponent end style

(6) begin mathsize 20px style square root of x minus 1 end root end style

begin mathsize 20px style square root of x minus 1 end root equals left parenthesis x minus 1 right parenthesis to the power of 1 half end exponent end style

(7) begin mathsize 20px style fraction numerator 5 over denominator root index 7 of x to the power of 4 end root end fraction end style

begin mathsize 20px style fraction numerator 5 over denominator root index 7 of x to the power of 4 end root end fraction equals 5 over x to the power of 4 over 7 end exponent equals 5 x to the power of negative 4 over 7 end exponent end style

 

مشتقة اقتران القوة

أجد مشتقة كل مما يأتي:

(8) begin mathsize 20px style f left parenthesis x right parenthesis equals 7 x cubed end style

begin mathsize 20px style f to the power of straight prime left parenthesis x right parenthesis equals 21 x squared end style

(9) begin mathsize 20px style f left parenthesis x right parenthesis equals 12 x to the power of 4 over 3 end exponent end style

begin mathsize 20px style f to the power of straight prime left parenthesis x right parenthesis equals 12 cross times 4 over 3 x to the power of 1 third end exponent equals 16 x to the power of 1 third end exponent end style

(10) begin mathsize 20px style f left parenthesis x right parenthesis equals 3 x squared minus 5 square root of 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 blank cell f left parenthesis x right parenthesis equals 3 x squared minus 5 x to the power of 1 half end exponent end cell row blank cell f to the power of straight prime left parenthesis x right parenthesis equals 6 x minus 5 over 2 x to the power of negative 1 half end exponent equals 6 x minus fraction numerator 5 over denominator 2 square root of x end fraction end cell end table end style

(11) begin mathsize 20px style f left parenthesis x right parenthesis equals negative 3 over x to the power of 7 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 f left parenthesis x right parenthesis equals negative 3 x to the power of negative 7 end exponent end cell row blank cell f to the power of straight prime left parenthesis x right parenthesis equals 21 x to the power of negative 8 end exponent equals 21 over x to the power of 8 end cell end table end style

(12) begin mathsize 20px style f left parenthesis x right parenthesis equals x squared left parenthesis x cubed minus 2 x right parenthesis 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 f left parenthesis x right parenthesis equals x squared left parenthesis x cubed minus 2 x right parenthesis equals x to the power of 5 minus 2 x cubed end cell row blank cell f to the power of straight prime left parenthesis x right parenthesis equals 5 x to the power of 4 minus 6 x squared end cell end table end style

(13) begin mathsize 20px style y equals 7 over x cubed plus 3 over x minus 2 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 y equals 7 x to the power of negative 3 end exponent plus 3 x to the power of negative 1 end exponent minus 2 end cell row blank cell fraction numerator d y over denominator d x end fraction equals negative 21 x to the power of negative 4 end exponent minus 3 x to the power of negative 2 end exponent equals fraction numerator negative 21 over denominator x to the power of 4 end fraction minus 3 over x squared end cell end table end style

إعداد : شبكة منهاجي التعليمية

10 / 07 / 2023

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