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Q41Section B (Part B)41 of 120

General solution given one solution

If φ(x)=x\varphi(x)=x is a solution of the ordinary differential equation (ODE)

d2ydx2−(2x2+1x)(xdydx−y)=0,0<x<∞,\frac{d^2y}{dx^2}-\Big(\frac2{x^2}+\frac1x\Big)\Big(x\frac{dy}{dx}-y\Big)=0,\quad 0<x<\infty,

then the general solution of the ODE is given by

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