Which of the following function(s) defined below has/have single point continuity.`f(x)=[1, if x in Q and 0 if x !in Q`

which of the following function(s) not defined at x=0 has/have removable discontinuity at x=0

which of the following function(s) not defined at x=0 has/have removable discontinuity at x = 0 .

which of the following function(s) not defined at x=0 has/have removable discontinuity at x = 0 .

Which of the following function(s) not defined at x =0 has / have removable discontinuity at x = 0 ?

Which of the following function(s) can be defined continuously at x=0?f(x)=(1)/(1+2^(cot x))

Which of the following function(s) not defined at x=0 has/have non-removable discontinuity atthe point x=0?f(x)=(1)/(1+2^((1)/(x)))

The following functions are not defined at x=0. Find f(0) so that f is continuous at x=0

Function f(x)={-1,x in Q and 1,x!in Q is continuous at x=0

The function f(x)={{:( 1, x in Q),(0, x notin Q):} , is

The function f(x)={{:( 1, x in Q),(0, x notin Q):} , is