Identify the integrating factor μ(x)\mu(x)μ(x) for the differential equation y′+2xy=xy' + \frac{2}{x}y = xy′+x2y=x.
μ(x)=x\mu(x) = xμ(x)=x
μ(x)=x2\mu(x) = x^2μ(x)=x2
μ(x)=2x\mu(x) = 2xμ(x)=2x
μ(x)=ln(x)\mu(x) = \ln(x)μ(x)=ln(x)