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A function f defined as f(x)=x[x] for -...

A function f defined as `f(x)=x[x]` for `-1lexle3` where [x] defines the greatest integer `lex` is

A

conti. at all points in the domain of but nonderivable at a finite number of points

B

discontinuous at all points and hence non-derivable at all points in the domain of f

C

discont. at a finite number of points but not derivable at all points i the domain of f

D

discont. & also non-derivable at a finite number of points of f.

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