$\mu(x) = e^x, y = \frac{1}{3}e^{2x} + Ce^{-x}$

$\mu(x) = e^x, y = e^{2x} + Ce^{-x}$

$\mu(x) = e^{-x}, y = \frac{1}{3}e^{2x} + Ce^x$

$\mu(x) = e^x, y = \frac{1}{2}e^{2x} + Ce^x$