Re: finding inverses of functions
- To: mathgroup at smc.vnet.net
- Subject: [mg126439] Re: finding inverses of functions
- From: Bob Hanlon <hanlonr357 at gmail.com>
- Date: Thu, 10 May 2012 05:00:11 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
- References: <201205090750.DAA05576@smc.vnet.net>
f[x_] = 3 x^3 + 2 E^(2 x);
g = InverseFunction[f];
Plot[f[x], {x, 0, 1},
PlotRange -> {{0, 1}, {0, 20}}]
Plot[g[x], {x, f[0], f[1]},
PlotRange -> {{0, 20}, {0, 1}}]
Bob Hanlon
On Wed, May 9, 2012 at 3:50 AM, John Accardi <accardi at accardi.com> wrote:
> 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.
>
- References:
- finding inverses of functions
- From: John Accardi <accardi@accardi.com>
- finding inverses of functions