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LucMeekes wrote:You lost an x(t) in the second equation:Oh, I see. Nevertheless the condition still is not fulfilled. Three equations for just two functions does not work.Does not mean that Mathcad 11 is happy to solve it, still too few initial conditions.LucI think you still have the wrong syntax for odesolve (or was it different in MC11 and more similar to the Prime syntax?
Can't remember.). In MC15 you simply write x and y, not x(t) and y(t).I attach the corrected sheet and a pdf-printout.EDIT: Replaced the MC file for a MC11 version. Hi Werner,Thanks for the correction. I don't use odesolve much (not enough?). Now it works, in the sense that I get a result.Whether it is the solution is up to debate, because the one equation I substituted in is obeyed except for a constant factor.(I'd expect dy/dt versus 2 lambda blabla to be the identity line, a straight line through (0,0) and (1,1). It is a straight line, goes through (0,0), but not through (1,1).I can stretch t.e all the way to yust before 30, then y(t) versus x(t) deviates from a straight lineLuc.
Solving Systems of Equations Using Mathcad Charles Nippert. You will solve a system of 2 simultaneous linear equations using successive approximations or by using the symbolic processor. The methods you will use can be easily adapted to other systems of equations.