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Let a function f(x), x  0 be such that f (x) + f(1/x) = f (x) .f(1/x) then f(x) can be :

(A)  1- x 2013

(B)  √|x| + 1

(C)  π/2 tan-1|x|

(D)  2/1 + k ln |x| , k being arbitrary constant

1 Answer

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Correct option (A)(B)(C)(D)


A & B are obvious

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