email@example.com (Walter Roberson) wrote in message <firstname.lastname@example.org>... > In article <email@example.com>, > Wouter Geelen <firstname.lastname@example.org> wrote: > > >I tried to do this myself but I can't get it done. I got > >the following equation. > > >Ti = -1200*exp(-1/7200*t)+1200 > > >Now I want to solve this function for Ti = 1080. So what I > >want to find is t. How do I do that :? > > Ti = -1200*exp(-1/7200*t)+1200, so > Ti - 1200 = -1200 * exp(-t/7200), so > (1200 - Ti)/1200 = exp(-t/7200), so > ln((1200 - Ti)/1200) = -t/7200, so > -ln(1200/(1200-Ti)) = -t/7200, so > t = 7200 * ln(1200/(1200-Ti)) > > Substituting in Ti = 1080, we get the result 7200 * ln(10) > which is about 16578.61267. > > -- > "Is there any thing whereof it may be said, See, this is new? It hath > been already of old time, which was before us." -- Ecclesiastes
Hahahaha yeah I know it can be done by algabra I already did myself lol but how do I this in matlab? Ain't there a function solve equation for paramater x?!? Or something like maple has?