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Grade: 12
        f and g are two differentiable functions which satisfy the condition g'a=2,g(a)=b and (fog)=I identify function,then f'(b) is equal to
10 years ago

Answers : (1)

Vanya Saxena
18 Points
							

Hi,

Identity function  i.e.    f [g(x)]= x

 differentiate both sides we get    f '[ g(x) ] g '(X) =1

              Put x=a  we get               f '(b).2=1

                                                        f '(b)=1/2

10 years ago
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