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)-m^2y` is equal to `m^2(a e^(m x)-b e^(-m x))` `1` (c) 0 (d) none of these

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