Find the general solution to y′′=e−xy'' = e^{-x}y′′=e−x.
y=e−x+Cx+Dy = e^{-x} + Cx + Dy=e−x+Cx+D
y=−e−x+Cy = -e^{-x} + Cy=−e−x+C
y=e−x+Cy = e^{-x} + Cy=e−x+C
y=xe−x+Cy = xe^{-x} + Cy=xe−x+C