x3p2+x2yp+a3=0 ---(1) is the given differential equation, where p=dy/dx
⟹y=−xp−a3/(x2p)
Differentiating with respect to x, we get;
p=−p−xdp/dx+a3/x2p2(dp/dx)+2a3/x3p
⟹2p+xdp/dx=2a3/px3+a3/x3p2(dp/dx)
⟹2p(1−a3/x3p2)+xdp/dx(1−a3/x3p2)=0
⟹2p+xdp/dx=0
⟹∫dp/p=−2∫dx/x
⟹px2=c⟹p=c/x2 ---(2)
Substituting (2) in (1), we get;
c2+xyc+a3x=0 which is a quadratic equation in c;
Equating it's discriminant to 0, we get;
x2y2−4a3x=0
⟹x(xy2−4a3)=0
⟹x=0andxy2−4a3=0
Both these satisfy (1).
Thus, x=0 and xy2−4a3=0 are the singular solutions of the given differential equation.
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