Find the general solution of the differential equation dydx + y = e − X
This is a first order linear differential equation, where p (x) = 1, q (x) = E-X ∫ general solution y = e − ∫ DX (∫ e − x · e ∫ dxdx + C) = e − x (∫ e − x · exdx + C) = e − x (x + C)