(y²-3x²)dy-2xydx=0,(y|x=0)=1求特解,后面是当x=0时 ,y=1
问题描述:
(y²-3x²)dy-2xydx=0,(y|x=0)=1
求特解,后面是当x=0时 ,y=1
答
设x/y=u,dx/dy=u+yu' (y²-3x²)dy-2xydx=0 (2u)du/(1-5u²)=dy/y 5dln│y│ +dln│5u²-1│=0 5x^2y^3-y^5=c c=-1