Overly complicated reductions?

*To*: mathgroup at smc.vnet.net*Subject*: [mg77584] Overly complicated reductions?*From*: "David Rees" <w3bdevilREMOVE at THISw3bdevil.com>*Date*: Wed, 13 Jun 2007 07:36:03 -0400 (EDT)

Consider f(x)=e^(-2x) I wanted to retreive the inverse function f^-1(x), Mathematica to the rescue: \!\(Reduce[y == E\^\(\(-2\) x\), x]\) \!\(C[1] \[Element] Integers && y != 0 && x == 1\/2\ \((2\ \[ImaginaryI]\ \[Pi]\ C[1] + Log[1\/y])\)\) This can't be right, I can rearrange it to just Ln(x)/-2 on paper. What did I do wrong? Thanks

**Follow-Ups**:**Re: Overly complicated reductions?***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>