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Re: Inverse function

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  • Subject: [mg115579] Re: Inverse function
  • From: Murray Eisenberg <murray at>
  • Date: Sat, 15 Jan 2011 04:45:40 -0500 (EST)

The function f[x_] := x^2 is not one-to-one, even on just the real 
numbers; and on the complex numbers it is exactly two-to-one (except at 
x = 0).  So it has no inverse function (as a real-valued function of a 
real variable).

So what are you really trying to ask?

On 1/14/2011 6:16 AM, Arnold wrote:
> Function y=x^2 is given. Give, please, a code in WM-7 with which help it is possible to receive function, return the given. That is, x=g (y).
> Thanks.

Murray Eisenberg                     murray at
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