Discrete Math Question:

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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+

Discrete Math Interview Question
Discrete Math Interview Question

Answer:

d) Z+ X Z+

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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