积分2次就行,答案如图所示
特征方程为r^2=r解得r=0,1即y"=y的解为y1=C1+C2e^x设特解为y*=x(ax+b)=ax^2+bx,代入方程得:2a=2ax+b+x对比系数:2a=b,2a+1=0解得:a=-0.5,b=-1故原方程通解y=y1+y*=C1+C2e^x-x(0.5x+1)