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f(x)=abs([x]x) -1lexle2 , then f(x) is ...

`f(x)=abs([x]x) -1lexle2` , then f(x) is
(where`[ast]` denotes greatest integer `lex`)

A

cont. at x = 0

B

discont. x = 0

C

not diff. at x = 2

D

diff. at x = 2

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