gaokao 2024 Q1

gaokao · China · beijing 4 marks Probability Definitions Set Operations

Given sets $M = \{ x \mid - 4 < x \leq 1 \} , N = \{ x \mid - 1 < x < 3 \}$, then $M \cup N =$ \_\_\_\_

Given sets $M = \{ x \mid - 4 < x \leq 1 \} , N = \{ x \mid - 1 < x < 3 \}$, then $M \cup N =$ \_\_\_\_