[单选题]已知U={1,2,3,4,5,6}，A={1,4}，B={1,2,6}，求ρ(A) - ρ(B) =( )。
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2023-11-01 15:17:28|
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[单选题]已知U={1,2,3,4,5,6}，A={1,4}，B={1,2,6}，求ρ(A) - ρ(B) =( )。
A.{ {4},{1,4}}
B.{{2},{6},{1,2},{1,6},{2,6},{1,2,6}}
C.{Φ,{1},{4},{1,4}}
D.{Φ,{1},{2},{6},{1,2},{1,6},{2,6},{1,2,6}}
A.{ {4},{1,4}}
B.{{2},{6},{1,2},{1,6},{2,6},{1,2,6}}
C.{Φ,{1},{4},{1,4}}
D.{Φ,{1},{2},{6},{1,2},{1,6},{2,6},{1,2,6}}
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