Question

f(X)=ln(x)+13x³-11x+cos(x), f'(x)=?

Answer 1

have u tried solving it?

Answer 2

no its completly difficult for me

Answer 3

do you know the derivative of lnx?

Answer 4

no

Answer 5

what is it?

Answer 6

\[f' (\ln(x)) = \frac{ 1 }{ x }\]
\[f' (a)^n = na^{n-1}\]
You should know the derivative of basic trig functions. They are very common in more advance math and should be well known.

Answer 7

do u know any link of these basics

Answer 8

Complete derivatives cheat sheet: http://tutorial.math.lamar.edu/pdf/Calculus_Cheat_Sheet_Derivatives.pdf

Answer 9

thank u very much