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Which of the following has range above y...

Which of the following has range above y = 2

A

f(x) = Sgn (1 – |x|)

B

`f(x) = Sgn ([x^2 – x]) `

C

`f(x) = Sgn ([x^2-x])`

D

`f(x) = Max {abstanx, cosabsx}x in [- pi,pi]`

Text Solution

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The correct Answer is:
D
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