Discrete Math Question:

The value of ⌊1/2.⌊5/2⌋ ⌋ is _______________.
a) 1
b) 2
c) 3
d) 0.5

a) 1

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The set of positive integers is _________ . a) Infinite b) Finite c) Subset d) Empty	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