solve this system by sustituting and building a function

how to do it?

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- Jan 5th 2011, 08:50 AMtransgalacticsolving a system by substitution 3b
solve this system by sustituting and building a function

how to do it? - Jan 6th 2011, 10:11 AMPaulRS
Apply the chain rule to get: ( evaluated at )

Then you have now you could solve it, say, by computing the matrix exponential.

For the initial values think what knowing would mean in terms of , at the end, when you have you can undo the change of variables to get the solution for . - Jan 18th 2011, 11:39 PMtransgalactic
you sat that y=x(u)t(u)=x(u)e^y

so the derivative is must have sum of two member

why you have one?