Evaluate the following
limits :
\[
\operatorname{Lt}_{x \rightarrow 1} \frac{\sqrt{3+x}-\sqrt{5-...
Evaluate the following
limits :
\[
\operatorname{Lt}_{x \rightarrow 1} \frac{\sqrt{3+x}-\sqrt{5-x}}{x^{2}-1} .
\]
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