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JEE MATHEMATICS MCQ: DIFFERENTIAL EQUATIONS

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Application +4 | -1
The solution of differential equation dy dx=yx+2ϕ(y/x)ϕ′(y/x)\frac{\mathrm{d} y}{\mathrm{~d} x}=\frac{y}{x}+2 \frac{\phi(y / x)}{\phi^{\prime}(y / x)} is
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Correct option: C
ϕ(y/x)=kx2\phi(y / x)=k x^2
Option C (ϕ(y/x)=kx2\phi(y / x)=k x^2) is correct because it is the solution to the given differential equation after applying the substitution y/x=uy/x = u.

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