Question
$\mathop {\lim }\limits_{x \to a} \frac{{\cos x - \cos a}}{{\cot x - \cot a}} = $
$= \mathop {\lim }\limits_{x \to a} {\sin ^3}x = {\sin ^3}a$.
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$I$. $\lim _{n \rightarrow \infty} \frac{2^n+(-2)^n}{2^n}$ अस्तित्व में नहीं है
$II$. $\lim _{n \rightarrow \infty} \frac{3^n+(-3)^n}{4^n}$ अस्तित्व में नहीं है तब