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Questions  

 Let f(x)=g(x)g(a)xa,xag(a), x=a,where g is a function derivable at x=a, then at x=a

a
f is continuous
b
f is discontinuous
c
f is continuous only if g′(a)=0
d
None of these

detailed solution

Correct option is A

limx→af(x)=limx→ag(x)−g(a)x−a                         =ddxgx  at x=a                        = g'a=fa⇒      f(x) is continuous at x=a.Hence (1) is the correct answer.

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