If f : R → R be given by 
, then fof (x) is
It is given that f : R → R be given by 
,
Then, fof(x) = f(f(x)) = 
⇒ fof(x) = x
13
If f : R → R be given by , then fof (x) is
It is given that f : R → R be given by ,
Then, fof(x) = f(f(x)) =
⇒ fof(x) = x