" The function "f(x)=(1)/(x-(x))" .The number of points at which "f(x)" is discontinuous is "

If f(x)={:{ (x-2 ,x 0) :} ,then number of points, where y=f(f(x)) is discontinuous is

If f(x)=x+{-x}+[x] , where [x] and {x} denotes greatest integer function and fractional part function respectively, then find the number of points at which f(x) is both discontinuous and non-differentiable in [-2,2] .

The number of points at which the function f(x) = 1/ (log |2x|) is discontinuous is

Function f(x)=x-|x| is discontinuous at x=0