View Single Post
Old 2019-01-25, 18:11   #168
VBCurtis
 
VBCurtis's Avatar
 
"Curtis"
Feb 2005
Riverside, CA

4,943 Posts
Default

Quote:
Originally Posted by S485122 View Post
(For instance it is obvious that x=y3 is not the inverse function of y=x3, since substituting x for your inverse function will give y=(y3)3=x9.)
Jacob
If you rewrite x = y3 to be in the format of y as a function of x, then the definition you cite applies. You're splitting hairs to say that y = x1/3 is the inverse, but x = y3 is not.

To find an inverse, switch x and y. If you want the inverse in g(x) format, then solve for y after switching x and y.
VBCurtis is offline   Reply With Quote