Let f(a) = g (a) = k and their n^(th) de...

Let f(a) = g (a) = k and their `n^(th)` derivatives `f^n` (a) and `g^n` (a) exist and are not equal for some n. Further if `lim_(x rarra)(f(a)g(x)-f(a)-g(a)f(x)+g(a))/(g(x)-f(x))`= 4 , then the value of k is

A

4

B

2

C

1

D

0

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The correct Answer is:

A

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