Determine the integrating factor for the exact equation y′+1xy=0y' + \frac{1}{x}y = 0y′+x1y=0.
μ(x)=x\mu(x) = xμ(x)=x
μ(x)=1/x\mu(x) = 1/xμ(x)=1/x
μ(x)=ex\mu(x) = e^xμ(x)=ex
μ(x)=ln(x)\mu(x) = \ln(x)μ(x)=ln(x)