Inverse function

1. Mar 7, 2005

yoyo

what is the inverse of of y=sqrt(x^3+x^2+x+1)

i know u are suppose to solve for x but having trouble....help please

2. Mar 8, 2005

dextercioby

Why don't u do it?
$$x^{3}+x^{2}+x+1=y^{2}$$

U need to solve this cubic for "x".Use Cardano's formulae.

Daniel.