A) 3
B) 5
C) 0
D) ?3
Correct Answer: B
Solution :
\[\underset{x\to a}{\mathop{\lim }}\,\,\frac{f(a)\,[g(x)-g(a)]-g(a)\,[f(x)-f(a)]}{[x-a]}\] \[=f(a){g}'(a)-g(a){f}'(a)=2\times 2-(-1)\,(1)=5.\]You need to login to perform this action.
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