13、设y=y(x)满足y" 2y y=0,且y(0)=0,y(0)=1,则y(x)dx 13、设y=y(x)满足y" 2y y=0,且y(0)=0,y(0)=1,则y(x)dx 发布时间:2025-06-20 05:14:59