Kenneth Rosen Edition 7 Exercise 2.3 Question 6 (Page No. 152)

Question

Find the domain and range of these functions.

1. the function that assigns to each pair of positive integers the first integer of the pair
2. the function that assigns to each positive integer its largest decimal digit
3. the function that assigns to a bit string the number of ones minus the number of zeros in the string
4. the function that assigns to each positive integer the largest integer not exceeding the square root of the integer
5. the function that assigns to a bit string the longest string of ones in the string