If `f(x)={{:(1,"x is rational"),(2,"x is irrational"):}` then

If f(x) = {{:(x,"x is rational"),(1-x,"x is irrational"):} then f(f(x)) is a) x in R b) {{:(x,"x is irrational"),(1-x,"x is rational"):} c) {{:(x,"x is rational"),(1-x,"x is rational"):} d)none of these

Discuss the continuity of function f(x)={{:(1,"if x is rational"),(0,"if x is irrational"):}

Let f : RRtoRR be defined by f(x)={{:(x" "x" is irrational"),(1-x" "x" is rational"):} then f is

If f(x) = {{:(1, "if x is rational"),(-1, "If x is irrational"):}} , then f : R to R is :

If f:[0,1]to[0,1] is defined by f(x)={{:(x," if x is rational"),(1-x," if x is irrational"):} , then (fof)(x) is

Let f(x) be given that f(x)={{:(,x,"if x is rational"),(,1-x,"if x is irrational"):} The number of points at which f(x) is continuous, is