74. The solution of the differential equation dydx=ex-y+x2 e-y is:
(A) y=ex-y-x2 e-y+c (B) ey-ex=x33+c(C) ey+ex=x33+c (D) ex-ey=x33+c
Ans:(B)
Explanation:
Given differential equation dydx=ex-y+x2 e-y
⇒dydx=ex.e-y+x2e-y⇒dydx=ex+x2ey⇒eydy=ex+x2dx⇒On integration both sides, we get⇒∫eydy=∫ex+x2dx⇒ey=ex+x33+c⇒ey-ex=x33+c