1.

\[\frac{d}{dx}\left( \frac{{{e}^{x}}}{1+{{x}^{2}}} \right)=\]

A. \[\frac{{{e}^{x}}(1+x)}{{{(1+{{x}^{2}})}^{2}}}\]
B. \[\frac{{{e}^{x}}{{(1-x)}^{2}}}{{{(1+{{x}^{2}})}^{2}}}\]
C. \[\frac{{{e}^{x}}{{(1+x)}^{2}}}{(1+{{x}^{2}})}\]
D. \[\frac{{{e}^{x}}{{(1-x)}^{2}}}{(1+{{x}^{2}})}\]
Answer» C. \[\frac{{{e}^{x}}{{(1+x)}^{2}}}{(1+{{x}^{2}})}\]


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