Question
$\frac{{{d^n}}}{{d{x^n}}}({e^{2x}} + {e^{ - 2x}}) = $
$\frac{{{d^2}}}{{d{x^2}}}[{e^{2x}} + {e^{ - 2x}}] = {2^2}[{e^{2x}} + {e^{ - 2x}}]$
$\frac{{{d^2}}}{{d{x^2}}}[{e^{2x}} + {e^{ - 2x}}] = {2^2}[{e^{2x}} - {e^{ - 2x}}]$
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$\frac{{{d^n}}}{{d{x^n}}}[{e^{2x}} + {e^{ - 2x}}] = {2^n}[{e^{2x}} + {( - 1)^n}{e^{ - 2x}}]$.
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