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If y=a e^(m x)+b e^(-m x), then (d^(2y))...

If `y=a e^(m x)+b e^(-m x),` then `(d^(2y))/(dx^2)` is equals to

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CENGAGE ENGLISH-LIMITS AND DERIVATIVES-All Questions
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  3. If y=a e^(m x)+b e^(-m x), then (d^(2y))/(dx^2) is equals to

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