单选题Set X = even integers and Set Y = odd integers. Therefore X ∩ Y = ______.Aprime numbersBintegersCempty setDcomposite numbersEwhole numbers
单选题
Set X = even integers and Set Y = odd integers. Therefore X ∩ Y = ______.
A
prime numbers
B
integers
C
empty set
D
composite numbers
E
whole numbers
参考解析
解析：
When two sets have nothing in common, we refer to their intersection as the empty set. There are two appropriate ways to denote the empty set: X∩Y={ } or X∩Y=φ.
When two sets have nothing in common, we refer to their intersection as the empty set. There are two appropriate ways to denote the empty set: X∩Y={ } or X∩Y=φ.
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