Let  f : N `to N :  f(x)  =2 x` for all  `x in N`   Show  that f  is one -one  and  into.
Channel: Doubtnut
Date: 19/04/2020

Let  f : N `to N :  f(x)  =2 x` for all  `x in N`   Show  that f  is one -one  and  into.