设集合M={x|-1≤x≤3/4},N={x|2/3≤x≤2},如果把b-a叫做集合A={x|a≤x≤b}的长度,设集合M={x|-1≤x≤3/4},N={x|2/3≤x≤2},如果把b-a叫做集合A={x|a≤x≤b}的"长度",呐么集合M∪N的"长度"是3请问怎么算出来的?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 01:13:25
![设集合M={x|-1≤x≤3/4},N={x|2/3≤x≤2},如果把b-a叫做集合A={x|a≤x≤b}的长度,设集合M={x|-1≤x≤3/4},N={x|2/3≤x≤2},如果把b-a叫做集合A={x|a≤x≤b}的](/uploads/image/z/10084375-55-5.jpg?t=%E8%AE%BE%E9%9B%86%E5%90%88M%3D%7Bx%7C-1%E2%89%A4x%E2%89%A43%2F4%7D%2CN%3D%7Bx%7C2%2F3%E2%89%A4x%E2%89%A42%7D%2C%E5%A6%82%E6%9E%9C%E6%8A%8Ab-a%E5%8F%AB%E5%81%9A%E9%9B%86%E5%90%88A%3D%7Bx%7Ca%E2%89%A4x%E2%89%A4b%7D%E7%9A%84%E9%95%BF%E5%BA%A6%2C%E8%AE%BE%E9%9B%86%E5%90%88M%3D%7Bx%7C-1%E2%89%A4x%E2%89%A43%2F4%7D%2CN%3D%7Bx%7C2%2F3%E2%89%A4x%E2%89%A42%7D%2C%E5%A6%82%E6%9E%9C%E6%8A%8Ab-a%E5%8F%AB%E5%81%9A%E9%9B%86%E5%90%88A%3D%7Bx%7Ca%E2%89%A4x%E2%89%A4b%7D%E7%9A%84%22%E9%95%BF%E5%BA%A6%22%2C%E5%91%90%E4%B9%88%E9%9B%86%E5%90%88M%E2%88%AAN%E7%9A%84%22%E9%95%BF%E5%BA%A6%22%E6%98%AF3%E8%AF%B7%E9%97%AE%E6%80%8E%E4%B9%88%E7%AE%97%E5%87%BA%E6%9D%A5%E7%9A%84%3F)
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