MCQ
If $y=a e^{5 x}+b e^{-6 x}$, then the differential equation is $\qquad$
- A$\frac{d^2 y}{d x^2}=25 y$
- B$\frac{d^2 y}{d x^2}=-25 y$
- C$\frac{d^2 y}{d x^2}=-5 y$
- D$\frac{d^2 y}{d x^2}=5 y$
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