In the first-order linear differential equation dy/dx + P(x)y = Q(x), the integrating factor is?

In the first-order linear differential equation dy/dx + P(x)y = Q(x), the integrating factor is?

Explanation

The integrating factor for a first-order linear differential equation dy/dx + P(x)y = Q(x) is exp (∫P(x)dx).

This is a well-known result in differential equations.