A) \[2\]
B) \[-2\]
C) \[0\]
D) \[1\]
Correct Answer: B
Solution :
\[\underset{x\to 4}{\mathop{\lim }}\,\,\,\frac{x\,f(4)-4f(x)}{x-4}\] \[=\underset{x\to 4}{\mathop{\lim }}\,\,\,\frac{f(4)-4f'(x)}{1}\] \[=f(4)-4f'(4)\] \[=\frac{6-4(2)}{1}=6-8\] \[=-2\]You need to login to perform this action.
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