1.

Which of the following function(s) is/are periodic?

Answer»

`F f(x)=(2^(x))/(2^([x])` where [ ] denotes greatest INTEGER function
`g(x)="sgn"{x}` where {x} denotes the fractional part function
`h(x)=SIN^(-1)(cos(x^(2))`
`k(x)=cos^(-1)(SQRT(sinx))`

Answer :A::B::D


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