Re: DSolving(?) for a given tangent
- To: mathgroup at smc.vnet.net
- Subject: [mg81368] Re: DSolving(?) for a given tangent
- From: dh <dh at metrohm.ch>
- Date: Fri, 21 Sep 2007 03:01:52 -0400 (EDT)
- References: <fct9c4$r6e$1@smc.vnet.net>
Hi Angle,
45 degree depends on your graphics scaling. Therefore, I assume you mean
a point where the derivative equals 1. This is easily solved by:
fun[x_]:=Exp[0.22 x]
Solve[D[fun[x],x]==1,x]
hope this helps, Daniel
ngleWyrm wrote:
> Don't know for sure if this is the right function, so here's the scenario:
>
> f[x_] := E^(0.22 x);
> Plot[f[x], {x, 6, 36}]
>
> Which plots a nice escalating curve.
>
> What I would like to know is: Where is the point {x,f[x]} that has a
> 45-degree tangent line; ie where is this curve's balance point before it
> really starts taking off?
>
>
>