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Period of f(x) = sgn ([x] + [-x]) is eq...

Period of `f(x) = sgn ([x] + [-x]) ` is equal to (where [ .] denotes greatest integer function) a)1 b)2 c)3 d)does not exist

A

1

B

2

C

3

D

does not exist

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The correct Answer is:
A
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