Solution:
We need to prove: function is many-one and into
It is given that:
We have,
So, all rational numbers will have same image i.e. 1
So,
The range of function is
Thus
Solution:
We need to prove: function is many-one and into
It is given that:
We have,
So, all rational numbers will have same image i.e. 1
So,
The range of function is
Thus