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Let y=sgn (x), then...

Let `y=sgn (x)`, then

A

`|x| = x Sgn (x)`

B

`sgn (sgn(x)) = sgn(x)`

C

`x = |x| Sgn (x)`

D

All of these

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The correct Answer is:
D
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AAKASH INSTITUTE-RELATIONS AND FUNCTIONS -Assignment (Section - B) Objective Type Questions (one option is correct)
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