微分方程y′-3xy-xy^2=0的通解
问题描述:
微分方程y′-3xy-xy^2=0的通解
答
y′-3xy-xy^2=0dy/dx=x(3y+y²)1/(3y+y²)dy=xdx1/3【1/y-1/(y+3)】dy=xdx1/3(lny-ln(y+3))=x²/2+lnc1/3lny/(y+3)=lnce^(x²/2)y/(y+3)=ce^(3x²/2)