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Let [] donots the greatest integer funct...

Let [] donots the greatest integer function and `f (x)= [tan ^(2) x],` then

A

`lim _(xto0) f (x)` does not exist

B

f (x) is continuous at `x=0`

C

f (x) is not differentiable at `x=0`

D

`f '(0)=0`

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The correct Answer is:
B, D
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