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1. 已知集合 $U=\{-2,-1,0,1,2,3\}, A=\{-1,0,1\}, B=\{1,2\}$, 则 $\oint_{U}(A \cup B)=()$

Gaokao · Math · previous-year question

  1. A.$\{-2,3\}$correct
  2. B.$\{-2,2,3\}$
  3. C.$\{-2,-1,0,3\}$
  4. D.$\{-2,-1,0,2,3\}$

Answer

A. $\{-2,3\}$

Explanation

【详解】由题意可得： $A \cup B=\{-1,0,1,2\}$ ，则 $ð_{U}(A \cup B)=\{-2,3\}$. 故选: A.

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