y = f(x) = x^3 - 8 Write an equation which represents y = f-1(x). The -1 in f-1 is in supercript form, which I think stands for inverse. This one is harder as it is a cubic expression. How to solve this? Thanks.

Follow Math Help Forum on Facebook and Google+

Originally Posted by shenton y = f(x) = x^3 - 8 Write an equation which represents y = f-1(x).... Hello, from $\displaystyle f(x)=x^3-8$ you get $\displaystyle f^{-1}: x=y^3-8 \Longrightarrow f^{-1}: x+8=y^3 \Longrightarrow f^{-1}: \sqrt[3]{x+8}=y$ EB