Find the integrating factor μ(x)\mu(x)μ(x) for the ODE: y′+4xy=x2y' + \frac{4}{x}y = x^2y′+x4y=x2.
e4xe^{4x}e4x
x−4x^{-4}x−4
4ln(x)4\ln(x)4ln(x)
x4x^4x4