The derivative of function \[f(x)\] is \[{{\tan }^{4}}x\]. If \[f(0)=0\] then \[\underset{x\to 0}{\mathop{\lim }}\,\frac{f(x)}{x}\]is equal to [J & K 2005]

The derivative of function \[f(x)\] is \[{{\tan }^{4}}x\]. If \[f(0)=0

1.	The derivative of function \[f(x)\] is \[{{\tan }^{4}}x\]. If \[f(0)=0\] then \[\underset{x\to 0}{\mathop{\lim }}\,\frac{f(x)}{x}\]is equal to [J & K 2005]
A.	1
B.	0
C.	?1
D.	None of these
Answer» C. ?1

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The derivative of function \[f(x)\] is \[{{\tan }^{4}}x\]. If \[f(0)=0\] then \[\underset{x\to 0}{\mathop{\lim }}\,\frac{f(x)}{x}\]is equal to [J & K 2005]

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