Identify the integrating factor μ(x)\mu(x)μ(x) for the linear equation dydx+1xy=x2\frac{dy}{dx} + \frac{1}{x}y = x^2dxdy+x1y=x2.
μ(x)=x\mu(x) = xμ(x)=x
μ(x)=ex\mu(x) = e^xμ(x)=ex
μ(x)=1x\mu(x) = \frac{1}{x}μ(x)=x1
μ(x)=x2\mu(x) = x^2μ(x)=x2