1.

If \[y=\frac{{{e}^{2x}}+{{e}^{-2x}}}{{{e}^{2x}}-{{e}^{-2x}}}\], then \[\frac{dy}{dx}=\]                   [AI CBSE 1988]

A.            \[\frac{-8}{{{({{e}^{2x}}-{{e}^{-2x}})}^{2}}}\]
B.            \[\frac{8}{{{({{e}^{2x}}-{{e}^{-2x}})}^{2}}}\]
C.            \[\frac{-4}{{{({{e}^{2x}}-{{e}^{-2x}})}^{2}}}\]
D.            \[\frac{4}{{{({{e}^{2x}}-{{e}^{-2x}})}^{2}}}\]
Answer» B.            \[\frac{8}{{{({{e}^{2x}}-{{e}^{-2x}})}^{2}}}\]


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