Re: Can Maximize return a function
- To: mathgroup at smc.vnet.net
- Subject: [mg74905] Re: Can Maximize return a function
- From: dh <dh at metrohm.ch>
- Date: Tue, 10 Apr 2007 06:03:34 -0400 (EDT)
- References: <evd3qo$5h2$1@smc.vnet.net>
Hi,
No Maximize can not work symbolically. However, you may e.g. use Reduce
or Solve to serach for singular points where the derivative is zero. E.g.:
Reduce[{D[a*x-x^2,x]==0},x]
Daniel
mfmad wrote:
> e.g.
>
> When I run:
>
> Clear["*"]
> SetAttributes[a, Constant]
> (*this works if use a num instead of a*)
> (*e.g. f[x_] := 4*x - x^2 *)
> f[x_] := a*x - x^2
> Maximize[f[x], a > 0, x]
>
> I get:
>
> Maximize[{-x^2+xy, y>0},x]
>
> when I really want something like:
>
> {a, {x->a/2}}
>
> Can this be done?
>
>
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