equation for inverse of y = x^3 + 1

jsh_aziza

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Joined
Dec 7, 2007
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5
I have to find the inverse of y=x^3+1.
My work is as follows:

y^3+1=x
y^3=x-1

Now from here I am not quite sure if I did my work right, what would be my next step? a, b or c?

(a)y=cbrt(x-1)
(b)y=cbrt x and cbrt -1
(c)y=(cbrtx) -1

Thx. for any help or advice. Just so you know this is part of a problem for graphing a function and its inverse.
 
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