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