1. （5 分）已知集合 $\mathrm{A}=\{-2,-1,0,1,2\}, B=\{x \mid(x-1)(x+2)<0\}$, 则 $A \cap B=(\quad)$
Gaokao · Math · previous-year question
- A.$\{-1,0\}$correct
- B.$\{0,1\}$
- C.$\{-1,0,1\}$
- D.$\{0,1,2\}$
Answer
A. $\{-1,0\}$
Explanation
解: $\mathrm{B}=\{x \mid-2<x<1\}, \mathrm{A}=\{-2,-1,0,1,2\}$; $\therefore A \cap B=\{-1,0\}$. 故选: A.
Practice more Gaokao questions
Answer thousands more real Gaokao previous-year questions free, get graded instantly, and climb the global ranked leaderboard.
Practice Gaokao free →More Gaokao Math questions
- 设集合 A=\{x \mid x \geq 1\}, B=\{x \mid-1<x<2\}, 则 A \cap B= (\quad)…
- 已知 a \in R,(1+a i) i=3+i, ( i 为虚数单位), 则 a=(\quad)…
- 已知非零向量 \vec{a}, \vec{b}, \vec{c}, 则“ \vec{a} \cdot \vec{c}=\vec{b} \cdot \vec{c} ”是“ \vec{…
- 若实数 x, y 满足约束条件 \left\{\begin{array}{l}x+1 \geq 0 \\ x-y \leq 0 \\ 2 x+3 y-1 \leq0\end{arr…
- 已知 a, b \in \mathrm{R}, a b>0, 函数 f(x)=a x^{2}+b(x \in \mathrm{R}). 若 f(s-t), f(s), f(s+t)…
- 已知数列 \left\{a_{n}\right\} 满足 a_{1}=1, a_{n+1}=\frac{a_{n}}{1+\sqrt{a_{n}}}\left(n \in \mat…
- 设 z=\frac{1-i}{1+i}+2 i, 则 |z|=(\qquad)…
- 已知集合 A=\left\{x \mid x^{2}-x-2>0\right\}, 则 C_{R} A=（ \qquad ）…