Re: Integral problem

*To*: mathgroup at smc.vnet.net*Subject*: [mg58318] Re: [mg58309] Integral problem*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Tue, 28 Jun 2005 05:13:18 -0400 (EDT)*Reply-to*: hanlonr at cox.net*Sender*: owner-wri-mathgroup at wolfram.com

expr=Rationalize[ 0.5*(1+10^7*((1-x-y)/1.5+x/8)^10)+ 0.004*x/((1-x-y)/1.5+x/8)^10]; Integrate[expr,{x,425/10000,1999/10000}, {y,8425/10000-x,8/10}]//N 1.9153852813471046*^8 Bob Hanlon > > From: HUAFANG CUI <huafangc at seas.upenn.edu> To: mathgroup at smc.vnet.net > Date: 2005/06/26 Sun PM 11:13:11 EDT > Subject: [mg58318] [mg58309] Integral problem > > Hi, > > I have a question about integral. I could not figure out what is wrong. > > function is > 0.5 * (1 + 10^7 * ((1-x-y)/1.5 + x/8)^10) + 0.004 * x / ((1-x-y)/1.5 + > x/8)^10) > > limit on y is > 0.8425 - x, 0.8 > > limit on x is > 0.0425, 0.1999 > > I run it on Ver4.0. It runs forever and does not stop. > > Thank you. > > HC > >