设全集U=R,集合M={x|x>0},N={x|x2≥x},则下列关系中正确的是A.M∩N∈M

设全集U=R,集合M={x|x>0},N={x|x2≥x},则下列关系中正确的是

A.M∩N∈M                               B.M∪NM

C.M∪N=R

                                D.(M)∩N=φ

答案

答案:C

解析:

由x2≥x,得x≤0或x≥1,∴N={x|x≤0或x≥1}.∴M∪N={x|x>0}∪{x|x≤0或x≥1}=R.

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