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Math Forum / Math Software / Maple / October 2008How to use Maple to solve a simple set of equations?
Hello I have a set of 2 equations that can be easily solved by hand but when I try to use "Maple solve" to solve it, no solution is shown. Here is the system: 2/(x+1)-4/(y-3) = -12/(x+1)(y-3) 3/x+1/y = 4/(x*y) x=1 and y=1. and here is the line in Maple that I have issued: solve({3/x+1/y = 4/(x*y), 2/(x+1)-4/(y-3) = -12/(x+1)(y-3)}, [x, y]) I have even tried with "assuming x <>0, y <>0, x<> -1,y <>3" What did I do wrong? Many thanks Ed In article <8eb83e1b-18e6-4693-bad3-661d5c0e1944@k30g2000hse.googlegroups.com>, > Hello > [quoted text clipped - 19 lines] > > Ed Your error is here: (x+1)(y-3) This is function (x+1) evaluated at argument (y-3) ... Presumably not what you intended? Better would be -12/(x+1)*(y-3) , but you probably actually do not mean that, but instead -12/((x+1)*(y-3))  SignatureG. A. Edgar http://www.math.ohio-state.edu/~edgar/ On 5 out, 19:18, "G. A. Edgar" <ed...@math.ohio-state.edu.invalid> wrote: > In article > <8eb83e1b-18e6-4693-bad3-661d5c0e1...@k30g2000hse.googlegroups.com>, [quoted text clipped - 37 lines] > > - Mostrar texto entre aspas - Oops! I forget to add "*". Many thanks and sorry for wasting your time. Regards Ed PS. Thanks twice - for the sci.math help too. > Hello > [quoted text clipped - 19 lines] > > Ed Besides G.A. Edgar's remark, I should point out that Maple wants you to say solve({...},{x,y}); (not [x,y])---at least not in my version of Maple 9.5. R.G. Vickson Ray Vickson skrev: > Besides G.A. Edgar's remark, I should point out that Maple wants you > to say solve({...},{x,y}); (not [x,y])---at least not in my version of > Maple 9.5. In more recent versions [x,y] is OK and has the advantage that the order is kept. The output, however, is not a sequence of lists, but a list of lists, unlike the {x,y} situation, where the output is a sequence of sets. Preben Alsholm |
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