1.

If \[y=a+b{{x}^{2}};a,b\] arbitrary constants, then [EAMCET 1994]

A.            \[\frac{{{d}^{2}}y}{d{{x}^{2}}}=2xy\]
B.            \[x\frac{{{d}^{2}}y}{d{{x}^{2}}}=\frac{dy}{dx}\]
C.            \[x\frac{{{d}^{2}}y}{d{{x}^{2}}}-\frac{dy}{dx}+y=0\]
D.            \[x\frac{{{d}^{2}}y}{d{{x}^{2}}}=2xy\]
Answer» C.            \[x\frac{{{d}^{2}}y}{d{{x}^{2}}}-\frac{dy}{dx}+y=0\]


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