We check the differential equation for exactness:
x−1ydx+(ln(2x−2)+y1)dy=0
M(x,y)=x−1y,∂y∂M=x−11
N(x,y)=ln(2x−2)+y1,∂x∂N=x−11
∂y∂M=x−11=∂x∂N We see that ∂y∂M=∂x∂N, so that this equation is exact.
We have the following system of differential equations to find the function u(x,y)
∂x∂u=x−1y
∂y∂u=ln(2x−2)+y1 Hence
u(x,y)=∫x−1ydx+φ(y)
=yln(x−1)+φ(y) Now, by differentiating this expression with respect to y and equating it to ∂y∂u, we find the derivative φ′(y)
ln(x−1)+φ′(y)=ln(2x−2)+y1
φ′(y)=ln2+y1
φ(y)=∫(ln2+y1)dy=yln2+lny−C Thus, the general solution of the differential equation is
yln(2x−2)+lny=C
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