Practice exam for the real one tomorrow...

Show that the differential equation 3:43,;5 + 53(1 + yy' = U is not exact, but becomes exact when multiplied by the integrating factor ,u(:r,y) = i5. Then solve the equation. my The given equation is not exact, because M, = which is dierent from N 2 After multiplication with Mm, y], the equation is exact, because then M, = m = The general solution of the differential equation is given implicitly by [:= s i\" any mm '3'