Find the integrating factor μ(x)\mu(x)μ(x) for the linear ODE y′+3xy=x2y' + \frac{3}{x}y = x^2y′+x3y=x2.
μ(x)=x3\mu(x) = x^3μ(x)=x3
μ(x)=3ln(x)\mu(x) = 3\ln(x)μ(x)=3ln(x)
μ(x)=x2\mu(x) = x^2μ(x)=x2
μ(x)=e3x\mu(x) = e^{3x}μ(x)=e3x