differentiation

Question: If $y=a{{e}^{mx}}+b{{e}^{-mx}}$, then $\frac{{{d}^{2}}y}{d{{x}^{2}}}-{{m}^{2}}y=$

1) ${{m}^{2}}(a{{e}^{mx}}-b{{e}^{-mx}})$

2) 1

3) 0

4) None of these

Solution:

Explanation: No Explanation

Differentiation by substitution Higher order derivatives

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