Therefore \(\{e^{-x},xe^{-x},x^2e^{-x}\}\) is a fundamental set of solutions of Equation \ref{eq:9.2.7} and the general solution of Equation \ref{eq:9.2.7} is Therefore \(\{e^{x},\cos x,\sin x\}\) is ...Therefore \(\{e^{-x},xe^{-x},x^2e^{-x}\}\) is a fundamental set of solutions of Equation \ref{eq:9.2.7} and the general solution of Equation \ref{eq:9.2.7} is Therefore \(\{e^{x},\cos x,\sin x\}\) is a fundamental set of solutions of Equation \ref{eq:9.2.8} and the general solution of Equation \ref{eq:9.2.8} is \[y=c_1e^x+c_2\cos x+c_3\sin x\].