gaokao 2021 Q1

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

1. Let sets $M = \{ x \mid 0 < x < 4 \}, N = \left\{ x \left\lvert \, \frac { 1 } { 3 } \leq x \leq 5 \right. \right\}$, then $M \cap N =$
A. $\left\{ x \left\lvert \, 0 < x \leq \frac { 1 } { 3 } \right. \right\}$
B. $\left\{ x \left\lvert \, \frac { 1 } { 3 } \leq x < 4 \right. \right\}$
C. $\{ x \mid 4 \leq x < 5 \}$
D. $\{ x \mid 0 < x \leq 5 \}$

1. Let sets $M = \{ x \mid 0 < x < 4 \}, N = \left\{ x \left\lvert \, \frac { 1 } { 3 } \leq x \leq 5 \right. \right\}$, then $M \cap N =$\\
A. $\left\{ x \left\lvert \, 0 < x \leq \frac { 1 } { 3 } \right. \right\}$\\
B. $\left\{ x \left\lvert \, \frac { 1 } { 3 } \leq x < 4 \right. \right\}$\\
C. $\{ x \mid 4 \leq x < 5 \}$\\
D. $\{ x \mid 0 < x \leq 5 \}$

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