Let f(x)=n x + n - [n x + n] tan"" (pi x...

Let `f(x)=n x + n - [n x + n] tan"" (pi x)/(2)`, where [x] is the greatest integer `le x` and `n in N`. It is

A

a periodic function of period 1

B

a periodic function of period `1//2`

C

not periodic

D

a periodic function of period 2

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The correct Answer is:

D

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