Question: If $f(x)=\left|\begin{array}{ccc}\cos x & x & 1 \\ 2 \sin x x^{2} & 2 x \\ \tan x & x & 1\end{array}\right|$, then $\lim _{x \rightarrow 0} \frac{f^{\prime}(x)}{x}$
exists and is equal to 0
exists and is equal to $-2$
exists and is equal to 2
does not exist
Correct Option: , 2
Solution:
Solution not required
