Try another version of this question Get help: Box 1: Enter your answer as an expression. Example: 3x^2+1, x/5, (a+b)/c
Find the derivative of `f(x)=``-6x^4-9x^9` .
`f'(x)=`
Be sure your variables match those in the question `-24 x^(3) -81 x^(8)`