A的范围-2≤x≤4.
B的范围m-3≤x≤m,B的补集是x<m-3或x>m.
因为A包含于B的补集 ,所以4<m-3或-2>m
即m>7或m
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包含于B的补集,则求m的取值范围
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包含于B的补集,则求m的取值范围
数学人气:393 ℃时间:2020-04-24 22:32:41
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