1.已知集合A={x| y=根号(x-2)+1\(x+3)},B={y| -x2-2x+3}, 则A∩B=?2. A={2≤x≤3},B={m+1≤x≤2m+5}, B是A的子集,求m取值
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/23 17:52:38
![1.已知集合A={x| y=根号(x-2)+1\(x+3)},B={y| -x2-2x+3}, 则A∩B=?2. A={2≤x≤3},B={m+1≤x≤2m+5}, B是A的子集,求m取值](/uploads/image/z/1332808-16-8.jpg?t=1.%E5%B7%B2%E7%9F%A5%E9%9B%86%E5%90%88A%3D%7Bx%7C+y%3D%E6%A0%B9%E5%8F%B7%EF%BC%88x-2%29%2B1%5C%EF%BC%88x%2B3%29%7D%2CB%3D%7By%7C+-x2-2x%2B3%7D%2C+%E5%88%99A%E2%88%A9B%3D%3F2.+A%3D%7B2%E2%89%A4x%E2%89%A43%7D%EF%BC%8CB%3D%7Bm%2B1%E2%89%A4x%E2%89%A42m%2B5%7D%2C+B%E6%98%AFA%E7%9A%84%E5%AD%90%E9%9B%86%EF%BC%8C%E6%B1%82m%E5%8F%96%E5%80%BC)
1.已知集合A={x| y=根号(x-2)+1\(x+3)},B={y| -x2-2x+3}, 则A∩B=?2. A={2≤x≤3},B={m+1≤x≤2m+5}, B是A的子集,求m取值
1.已知集合A={x| y=根号(x-2)+1\(x+3)},B={y| -x2-2x+3}, 则A∩B=?
2. A={2≤x≤3},B={m+1≤x≤2m+5}, B是A的子集,求m取值
1.已知集合A={x| y=根号(x-2)+1\(x+3)},B={y| -x2-2x+3}, 则A∩B=?2. A={2≤x≤3},B={m+1≤x≤2m+5}, B是A的子集,求m取值
1.
由根号(x-2)知x大于等于2,又有x-3不等于0,所以A的集合为2≤x且不等于3;Y=-(X+1)2+4,所Y≤4,A∩B=【2,4】(X不等于3)
2.
B不是空集时2≤m+1,2m+5≤3,m没解 ,B空集时,m小于4
所以x小于-4