设全集I=R,已知集合M=﹛x|﹙x+3﹚²≤0﹜,N=﹛x|x²+x-6=0﹜
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/06 15:43:26
设全集I=R,已知集合M=﹛x|﹙x+3﹚²≤0﹜,N=﹛x|x²+x-6=0﹜
﹙1﹚求﹙CIM﹚∩N﹔﹙2﹚记集合A=﹙CIM﹚∩N,已知集合B=﹛x|a-1≤x≤5-a,a∈R﹜,若B∪A=A,求实数a的取值范围
要详细步骤!
﹙1﹚求﹙CIM﹚∩N﹔﹙2﹚记集合A=﹙CIM﹚∩N,已知集合B=﹛x|a-1≤x≤5-a,a∈R﹜,若B∪A=A,求实数a的取值范围
要详细步骤!
(1)M = {x丨(x + 3)² ≤ 0}= {- 3}
N = {x 丨x ² + x - 6 = 0}= {- 3,2}
∴ CI M = {x 丨x ≠ - 3}
(CI M) ∩ N = {2}
(2)A = (CI M) ∩ N = {2}
∵ B ∪ A = A
∴① 当 B 为空集时,则:a - 1 > 5 - a
2 a > 6
a > 3
② 当 B 不为空集时,则:
a - 1 = 5 - a = 2
∴ a = 3
综上,a的取值范围是 a ≥ 3
N = {x 丨x ² + x - 6 = 0}= {- 3,2}
∴ CI M = {x 丨x ≠ - 3}
(CI M) ∩ N = {2}
(2)A = (CI M) ∩ N = {2}
∵ B ∪ A = A
∴① 当 B 为空集时,则:a - 1 > 5 - a
2 a > 6
a > 3
② 当 B 不为空集时,则:
a - 1 = 5 - a = 2
∴ a = 3
综上,a的取值范围是 a ≥ 3
设全集I=R,已知集合M=﹛x|﹙x+3﹚²≤0﹜,N=﹛x|x²+x-6=0﹜
全集I=R,已知集合M={x|(x+3)²≤0},
已知全集I=R,若函数f(x)=x²-3x+2,集合M={x|f(x)≤0},N={x|f′(x)<0},则M
已知全集U=R,集合M={x|x≤3},N={x|x
设全集I=R,已知集合M={x|(x+3)^2≤0},N={x|x^2+x-6=0}(1)求(CIM)∩N
设全集为R,集合M={x|2x>x+3},N={x|-1
已知全集U=R,集合M=﹛x▏x²-2x+1﹥0﹜,N=﹛x▏y=log½(x-1)﹜,则Cu(M∩
设集合M=﹛x|2x-3﹤0﹜,N=﹛x∈R|x²=9﹜,求M∩N
设全集U=R,集合M={x|f(x)=0},N={x|g(x)=0}
已知全集U=R,集合M={x丨x≤3},N={x丨x
已知全集I为R,集合A={x/2^x1},集合M={x/x
已知集合A={x丨x^2-2x-8≤0},B={x丨x^2-(2m-3)x+m^2-3m≤0,m∈R},设全集为R,若A