How to obtain numberical value from an InverseFunction?

*To*: mathgroup at smc.vnet.net*Subject*: [mg80916] How to obtain numberical value from an InverseFunction?*From*: "Nasser Abbasi" <nma at 12000.org>*Date*: Wed, 5 Sep 2007 02:58:40 -0400 (EDT)

Hello; Are inverse function in Mathematica only have symbolic form and can't be used to evaluate numerically? Anything I am trying is not working, this is a very simple example: f[x_] := x InverseFunction[f][x] Now, how to evaluate anything out of the above? say for x=0.5, I expected to get .5, but all I get is just f(^-1)[x][.5] any ideas? Very little help on InverseFunctions. Nasser

**Follow-Ups**:**Re: How to obtain numberical value from an InverseFunction?***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>