What is the derivative of $ln(10-x)$ ?

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Answer 1 · 2015-09-25T04:36:54

Refer to explanation

The derivative of a function with formula

$lnf(x)$ is $(f'(x))/f(x)$ hence we have that

$f'(x)=((10-x)')/(10-x)=-1/(10-x)=1/(x-10)$

What is the derivative of ln(10-x)ln(10-x)?