Question

Any one know how to do this pls help

Answer 1

f^-1(x) = [(x + 1)/2]^⅓

Explanation:

y = 2x³ - 1

Make x the subject

2x³ = y + 1

x³ = (y + 1)/2

x = [(y + 1)/2]^⅓

Interswitch variables

f^-1(x) = [(x + 1)/2]^⅓