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Questions  >>  CBSE XII  >>  Math  >>  Differential Equations
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Which of the following differential equations has $y\;=\;c_1e^x+c_2e^{-x}$ as the general solution?

\[(A)\;\frac{d^2y}{dx^2}+y=0\quad(B)\;\frac{d^2y}{dx^2}-y=0\quad(C)\;\frac{d^2y}{dx^2}+1=0\quad(D)\;\frac{d^2y}{dx^2}-1=0\]

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