Question

Use the logarithmic differentiation to find the derivative of the function y= X^2 times cosx

Answer 1

\[f(x)=x^2\cos(x)\]?

Answer 2

or it is
\[f(x)=x^{2\cos(x)}\] the first one does not need log diff, the second one does

Answer 3

Well in my textbook it says to find the derivative of the first one using the log diff

Answer 4

i would use the product rule
\[(fg)'=f'g+g'f\] cant imagine what would be gained using logarithms,
you would have to clean up a big mess when you were done

Answer 5

ok, thanks!!!