Question

f(k(x)) if k(x)=x^-2/3 and f(x)=2x^3

Answer 1

3xk(x)=1/x

Answer 2

substitute \[x^{-2/3}\] for x i f(x)

\[f(x^{-2/3}) = 2(x^{-2/3})^3\]

using index laws.... multiply the powers

\[f(k(x)) = 2x^{-2}\]

or

\[f(k(x)) = 2/x^2\]