Discrete Math Question:

The domain of the function that assign to each pair of integers the maximum of these two integers is ________.
a) N
b) Z
c) Z +
d) Z+ X Z+

d) Z+ X Z+

Previous Question	Next Question
Which of the following function f: Z X Z → Z is not onto? a) f(a, b) = a + b b) f(a, b) = a c) f(a, b) = \|b\| d) f(a, b) = a - b	Let f and g be the function from the set of integers to itself, defined by f(x) = 2x + 1 and g(x) = 3x + 4. Then the composition of f and g is ________. a) 6x + 9 b) 6x + 7 c) 6x + 6 d) 6x + 8