Find the integrating factor μ(x)\mu(x)μ(x) for the linear equation y′+2xy=3xy' + \frac{2}{x}y = 3xy′+x2y=3x.
μ(x)=x2\mu(x) = x^2μ(x)=x2
μ(x)=2x\mu(x) = 2xμ(x)=2x
μ(x)=x\mu(x) = xμ(x)=x
μ(x)=ln∣x∣\mu(x) = \ln|x|μ(x)=ln∣x∣