Question

Find the derivative of the function F(x) = (x4 + 9x2 − 5)4

Answer 1

The answer is $16x^{3}$

Answer 2

$\bf f(x)=(x^4+9x^2-5)^4\implies \cfrac{dy}{dx}=\stackrel{chain-rule}{4(x^4+9x^2-5)^3(4x^3+18x)}$