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数学
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已知集合A={x|-3≤x≤4},B={x|2m-1
人气:225 ℃ 时间:2020-03-21 09:47:50
解答
集合A={x|-3≤x≤4},B={x|2m-1比如3>4,是无解的,∴B=φ
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