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finding inverses of functions

• To: mathgroup at smc.vnet.net
• Subject: [mg126418] finding inverses of functions
• From: John Accardi <accardi at accardi.com>
• Date: Wed, 9 May 2012 03:50:21 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hello,  I am trying to get Mathematica to find the inverse of:

y = 3x^3 + 2e^(2x)  (which I know is invertible)

InverseFunction only seems to give inverses of built-ins, like Sine.

I tried: 

Solve[ y == 3x^3 + 2e^(2x), x ] but get a message that Solve does not have methods suitable.  (Solve works for simpler functions, however.)

Any ideas?  Thanks.

• Follow-Ups:
  • Re: finding inverses of functions
    • From: Andrzej Kozlowski <akozlowski@gmail.com>
  • Re: finding inverses of functions
    • From: DrMajorBob <btreat1@austin.rr.com>
  • Re: finding inverses of functions
    • From: Bob Hanlon <hanlonr357@gmail.com>