Derivative Help: differentiate using product rule

digidako
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Homework Statement



(1-2x3+x2)((1/x3)+1)

Homework Equations



f'g(x)+g'f(x)
f'(x)=-6x3+2x
g'(x)=(-1/x4)

The Attempt at a Solution



I found what i believe to be the derivative of both f(x) & g(x) and used the product rule to get to where I am stuck right now:

[(-6x2+2x)(1/x3)]+[(-1/x4)(1-2x3+x2)
 
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digidako said:

Homework Statement



(1-2x3+x2)((1/x3)+1)

Homework Equations



f'g(x)+g'f(x)
f'(x)=-6x3+2x
g'(x)=(-1/x4)

The Attempt at a Solution



I found what i believe to be the derivative of both f(x) & g(x) and used the product rule to get to where I am stuck right now:

[(-6x2+2x)(1/x3)]+[(-1/x4)(1-2x3+x2)
Your result for g'(x) is wrong, assuming that g(x)=1/x3+1. Your f'(x)g(x) is wrong too.
 

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