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Let f : N → R be the function defined by f (x) = (2x-1)/2

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Let f : N → R be the function defined by f (x) = (2x-1)/2 and g : Q → R be another function defined by g (x) = x + 2. Then (g o f) 3/2 is

(A) 1 

(B) 5

(C)7/2

(D) none of these

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Answer is (D)

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