A={x丨x2-4x+3≤0}B={x丨y=1/根号x-2}（1）.求A∩B,(CRB)∪A
A={x丨x2-4x+3≤0}={x丨1
A={x丨x2-4x+3≤0}B={x丨y=1/根号x-2}（1）.求A∩B,(CRB)∪A
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