Math Help - Inverse equations

it gives this:

The function is strictly increasing on and therefore has an inverse function .

(a) Find

(b) Find

i know the rule is for the second, but what do i plug into to make it ??

Originally Posted by Arez

... but what do i plug into to make it ??

er, x = 1 seems to work

it should be more or less easy to see this, but if not, just set x^5 + x = 2 and solve for x. which is harder.