来自贾晓岚的问题
A=(X大于等于-2小于等于5),B=(X大于等于M-5小于等于2M-1),若A∩B=A,求M?
A=(X大于等于-2小于等于5),B=(X大于等于M-5小于等于2M-1),若A∩B=A,求M?
1回答
2020-10-11 07:11
A=(X大于等于-2小于等于5),B=(X大于等于M-5小于等于2M-1),若A∩B=A,求M?
A=(X大于等于-2小于等于5),B=(X大于等于M-5小于等于2M-1),若A∩B=A,求M?
∵A∩B=A,
∴M-5≤-2
2M-1≥5
∴M=3.