Exam-style question
Try this first
Which statement best describes a function written as ℕ → ℕ?.
- A.It maps values from the natural numbers to values from the natural numbers
- B.It maps values from the natural numbers to any real number
- C.It maps values from the co-domain to the domain
- D.It maps only negative integers to positive integers
Model answer
What a good answer should say
- It maps values from the natural numbers to values from the natural numbers
Explanation
Why this works
The notation ℕ → ℕ indicates that the domain is the natural numbers and the co-domain is also the natural numbers.
Common mistake
No common mistake is linked to this question yet.