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Let f(x) be defined as f(x)={([x],-2l...

Let `f(x)` be defined as
`f(x)={([x],-2lexle(-1)/2),(2x^(2)-1,(-1)/2ltxle2):}`
then number of points where `|f(x)|` is non-differentiable is
(where [.] denotes greatest integer function):

A

2

B

4

C

1

D

3

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