1.设A={,,},则 =,=,=．

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/29 03:15:08

1.设A={,,},则 =________,=________,=________．
2.设A={1,2,3},R={,},则R的自反闭包r(R)= ____________,对称闭包s(R)= ____________．

第一个题目不全啊
第二题：自反闭包为={,,,},
对称闭包为={,,},
再问： 1.设A={,,}，则 domA=________， ranA =________， fldA=________．
再答： domA为{a,b,c}ranA为{1,2,3}fldA为{a,b,c,1,2,3}

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