1.

Let f(x) and g(x) be differentiable functions in (a,b) continuous in [a,b] and g(x) cancel(=) 0 in [a,b] for atleast one c in (a,b) such that (g(a) f(b)- f(a) g(b))/(g(c ) f'(c ) -f(c ) g'(c ) ) = k (g (a) g(b))/(g(c )^(2))then k =

Answer»

(b-a)
(b+a)
(2b+a)
(b-2a)

ANSWER :A


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