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You are not logged in. #1 20051230 12:10:31
Equation Problem.. t=??a = x0 * (1t)³ + x1 * 3 * t * (1t)² + x2 * 3 * t² * (1t) +x3 * t³ #2 20051230 12:26:50
Re: Equation Problem.. t=??It would be something very VERY ugly. IPBLE: Increasing Performance By Lowering Expectations. #3 20051230 12:43:00
Re: Equation Problem.. t=??Code:a = x0 * (1t)³ + x1 * 3 * t * (1t)² + x2 * 3 * t² * (1t) +x3 * t³ 12t+t^2(1t) 12t+t^2 3x2(t^2t^3) x3t^3 3x1 (t2t^2+t^3)   12t+t^2    t +2t^2 t^3     v v v x0(13t+3t^2t^3) (x0+3x13x2+x3)t^3 + (3x06x1+3x2)t^2 + (3x0+3x1)t + x0 I don't know what to do next to this cubic equation. igloo myrtilles fourmis #4 20051230 12:59:16
Re: Equation Problem.. t=??Code:I found a method to possibly get close to an answer. a = (x0+3x13x2+x3)t^3 + (3x06x1+3x2)t^2 + (3x0+3x1)t + x0 Get t on left side, and put a on right, leave t^3 and t^2 on right side. (3x0+3x1)t = (x0+3x13x2+x3)t^3 + (3x06x1+3x2)t^2 + x0  a Divide by (3x0+3x1) t = (1/(3x0+3x1)) ((x0+3x13x2+x3)t^3 + (3x06x1+3x2)t^2 + x0  a ) Make a guess at t and plug it into the t^3 and t^2 and solve right side of equation. Take answer and put it back in again. Repeat until you appear to be getting closer and closer to last result. I don't know if this will work, but I just read this on a web page about solving a cubic. igloo myrtilles fourmis #5 20051230 13:09:36
Re: Equation Problem.. t=??ax^3+bx^2+cx+d=0 Last edited by krassi_holmz (20051230 13:10:46) IPBLE: Increasing Performance By Lowering Expectations. #6 20051230 13:11:26
Re: Equation Problem.. t=??I told you it will be ugly. IPBLE: Increasing Performance By Lowering Expectations. #8 20051230 19:19:28
Re: Equation Problem.. t=??OK,Here is the answer direct from the original equation: Last edited by krassi_holmz (20051230 19:20:30) IPBLE: Increasing Performance By Lowering Expectations. #9 20051230 21:40:06
Re: Equation Problem.. t=??Ye Gods! "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman #10 20051231 02:54:50
Re: Equation Problem.. t=??
Method used is similar to this example: igloo myrtilles fourmis 