Diff. Eq.

  • Thread starter pr0blumz
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y(lnx-lny)dx = (xlnx-xlny-y)

Homework Statement





Homework Equations





The Attempt at a Solution



dy/dx = y(lnx-lny)/(xlnx-xlny-y)

y = ux

dy/dx = u + xu'

u + xu' = ux(lnx-lnux)/(xlnx-xlnux-ux)

u + xu' = (ulnx-ulnux-ulnux)/(lnx-lnux-u)

xu'= (ulnx-ulnux-ulnx)/(lnx-lnux-u)-u

xu'= (ulnx-ulnux-ulnx+ulnux+u^2)/(lnx-lnux-u)

xu' = (u^2)/(lnx-lnux-u)

(lnx-lnux-u) /(u^2) *du = dx/x

(lnx-lnux-u) /(u^2)* du - dx/x = 0

Am I correct so far or did I mess up somewhere? Thanks

Edit: I figured out that I had to solve for dx/dy since M(x,n) was simpler and solved the problem.
 
Last edited:

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