gaokao 2023 Q1

gaokao · China · national-A-science 5 marks Probability Definitions Set Operations

Let $A = \{ x \mid x = 3k + 1 , k \in Z \} , B = \{ x \mid x = 3k + 2 , k \in Z \} , U$ be the set of integers, then $C_{U}(A \bigcap B) =$
A. $\{ x \mid x = 3k , k \in Z \}$
B. $\{ x \mid x = 3k - 1 , k \in Z \}$
C. $\{ x \mid x = 3k - 1 , k \in \mathrm{Z} \}$
D. $\varnothing$

Let $A = \{ x \mid x = 3k + 1 , k \in Z \} , B = \{ x \mid x = 3k + 2 , k \in Z \} , U$ be the set of integers, then $C_{U}(A \bigcap B) =$

A. $\{ x \mid x = 3k , k \in Z \}$

B. $\{ x \mid x = 3k - 1 , k \in Z \}$

C. $\{ x \mid x = 3k - 1 , k \in \mathrm{Z} \}$

D. $\varnothing$

Paper Questions

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