Question

21. Consider the function f:R-> (0, 1) such that
f(x)={1, if x is rational
{0, if x is irrational
Which one of the following is correct?
(a) The function is one-one into
(b) The function is many-one into
(c) The function is one-one onto
(d) The function is many-one onto​

Answer 1

Answer:

a answer is write it's are there will be