MCQ
The differential equation of $y=k_1 e^x+k_2 e^{-x}$ is
- ✓$\frac{d^2 y}{d x^2}-y=0$
- B$\frac{d^2 y}{d x^2}+\frac{d y}{d x}=0$
- C$\frac{d^2 y}{d x^2}+y \frac{d y}{d x}=0$
- D$\frac{d^2 y}{d x^2}+y=0$
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