F'(x) if f( x) = 8/5x^4 ?

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F'(x) if f( x) = 8/5x^4 ?

please help i don't understand this problem

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Answer 1 · 2017-10-02T11:11:36

#f(x)=8/(5x^4)=8/5x^-4#
After differentiating,
#f^'(x)=8/5×-4×x^(-4-1#[using the rule of differentiating of #x^n# #=>d/(dx)x^n=nx^(n-1#
So we get ,
#f^'(x)=-32/5×x^-5=-32/(5x^5#
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F'(x) if f( x) = 8/5x^4 ?

please help i don't understand this problem

1 Answer

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