Advanced Search

Question: warning - "solutions may have been lost" (non linear)

Question:warning - "solutions may have been lost" (non linear)

elango8 151 Maple
solve fsolve nonlinear
May 19 2009
0
I tried solving a set of 7 nonlinear equations but maple evaluates for about an hour and then says that "warning : solutions may have been lost " i dont have any clue why it is saying so.there are atleast 3 variables in my equations that are highly nonlinear(the others dont have exp term) like for ex K3 = exp((10/83*((331633008319937/35184372088832)*t(51771823070780165/18014398509481984)*t^2+(75602827664593996951/112589990684262400000)*t^3(1277474181801312151/22517998136852480000)*t^4+(2843667344285109159/288230376151711744)/t-16833719293751822493/112589990684262400+(1000*((826799178196579/70368744177664000)*log(t)+(7877788158670137604117/1759218604441600000000000)*t-(176307706342234984603/225179981368524800000000)*t^2+(8271716399595115333/135107988821114880000000)*t^3-(21171056730187913320403/3518437208883200000000000)/t^2+23664737207932880533/70368744177664000000-(14163363/3125000000)/t-(7612459967539838811/281474976710656000000)*log(1000*t)+(833139/3125000000)/t^3-(224367/12500000000)/t^4))*t))/t) is there any other way to solve such systems other than using solve command,coz i only need to find the positive set of solutions among all.The following is how i did it...i have assigned values for the variables in terms of t (hCO,hCO2....) solve({K2*a2*a4-a1*a3, K3*a4*a6-a1*a2, (1/4)*K1*(a1+a2+a3+a4+a5+a6)^2*a5*a6-a1^3*a2, 2*a1+2*a4+4*a5-1.6-2*1.2, a2+a3+a5+a6-1, -202.86-.8*215.2218-a1*hH2-a2*hCO-a3*hCO2-a4*hH2O-a5*hCH4-a6*hC, a2+2*a3+a4-.77-1.2}, [a1, a2, a3, a4, a5, a6, t]) I tried using fsolve to but it says "Error, (in fsolve) invalid arguments"....so let me know what im doin wrong...thanks in advance
Please Wait...