dy/dx= (2x-y)/(x+y) all subject to y(1) = 1

I am not sure where to take this. I divided everything by x and made the subsequent y/x = V and then worked from there. please can you help

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- March 8th 2009, 12:25 PMmanalive04solve differential equation HELP pls
dy/dx= (2x-y)/(x+y) all subject to y(1) = 1

I am not sure where to take this. I divided everything by x and made the subsequent y/x = V and then worked from there. please can you help - March 8th 2009, 12:49 PMHallsofIvy
- March 8th 2009, 12:59 PMmanalive04
i got an improper fraction which i am not sure what to do with

x(dv/dx) = (2 - 2v - v^2)/1+v

then took everything to the other side ==>

(1+v)/(2-2v-v^2)dv = dx/x

then to intergrate both sides

but how do you do the LHS? it is topheavy? - March 8th 2009, 01:06 PMskeeter
- March 8th 2009, 01:12 PMmanalive04
- March 8th 2009, 01:19 PMskeeter
hint:

- March 8th 2009, 01:22 PMmanalive04
- March 8th 2009, 01:37 PMe^(i*pi)
- March 8th 2009, 01:44 PMmanalive04
- March 8th 2009, 02:51 PMskeeter