Re: calculate the area

*To*: mathgroup at smc.vnet.net*Subject*: [mg112667] Re: calculate the area*From*: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>*Date*: Sat, 25 Sep 2010 02:21:19 -0400 (EDT)*References*: <i7hmlq$i4q$1@smc.vnet.net>

I assume you don't have Mathematica? This is too easy... In[188]:= Solve[y/(1 - y) == c*x/(1 - x), y] Out[188]= {{y -> (c x)/(1 - x + c x)}} In[189]:= Integrate[(c x)/(1 - x + c x), x] Out[189]= c (x/(-1 + c) - Log[1 - x + c x]/(-1 + c)^2) Obviously, 1 - x + c x and x-1 shouldn't be zero Cheers -- Sjoerd On Sep 24, 10:14 am, Steven <stevenwang.... at gmail.com> wrote: > Hi All, > > I need to calculate the area for the following curve: > > y/(1-y)=c*x/(1-x) > > Can any one help me to get a formula? Thanks! > > Steven