PDE separation of variable problem

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SUMMARY

The discussion centers on solving the partial differential equation (PDE) \(\frac{du}{dx}+y\frac{du}{dy}=(2x+y)u\) using the method of separation of variables. The solution derived is \(u(x,y)=5ye^{y-1+x^{2}-x}\), which satisfies the boundary condition \(u(x,1)=5e^{x^{2}-x}\). A key insight shared by the participant was the importance of including the arbitrary integration constant, C, during the integration of the Y term, which was initially overlooked.

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Homework Statement



Using the method of separation of variables, obtain a solution of the following PDE subject to
the given conditions

\frac{du}{dx}+y\frac{du}{dy}=(2x+y)u

u(x,1)=5e^{x^{2}-x}


Homework Equations





The Attempt at a Solution



See my attached working

the answer is u(x,y)=5ye^{y-1+x^{2}-x}

Im not sure if I am getting anywhere near close in my working out. Have double checked the arithemetic and everything seems fine so far
 

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hi guys

an update on the problem. I managed to solve it.

The issue was that I didn't consider the arbirtrary integration constant, C, when doing the integral of the Y term.
 

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