Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Mathematics Relations and Functions Types of Functions
If N is set of natural numbers and f: N → N and f(x) = x + 1 for x ∈ N, then
I: f(x) is one-one.
II: f(x) is onto.
Which of the following statement(s) is/are correct?
1
Only I
2
Only II
3
Both I and II
4
None