1.2.指出下列关系中那些是正确的,那些是错误的,并说明理由-|||-(1) (Acup B)-C=Acup (B-C);-|||-(2) (Acup B)-A=B;-|||-(3) (overline (Acup B))C=overline (A)Bcup overline (B)C-|||-(4) overline (A)Bcup Aoverline (B)cup overline (A)overline (B)=overline (AB) ;-|||-(5) (AB)(Aoverline (B))=;-|||-(6)若 subseteq A, 则 cup B=A

3.指出下列等式和命题是否成立,并说明理由:-|||-(1) cup B=(AB)cup B;-|||-(2) overline (A)B=Acup B:-||

1.证明:-|||-(1) (Acup B)|C=A|(Bcup C) ;-|||-(2) (Acup B)|C=(A|C)cup (B|C) -

5.化简:-|||-(1)(AB∪C)(AC);-|||-(2) (Acup B)(Acup overline (B)).

A，B为两事件，若(Acup B)=0.8，(Acup B)=0.8，则（）成立.A.(Acup B)=0.8B.(Acup B)=0.8C.(Acup B)=

设A、B、C是任意三个随机事件，则下列命题正确的是( )(Acup B)-B=A-B(Acup B)-B=A-B(Acup B)-B=A-B(Acup B

A，B，C是任意事件，在下列各式中，不成立的是（）(A) (A-B)cup B=Acup B.-|||-(B) (Acup B)-A=B.-|||-(C) (A

(1)设事件A与B相容,则有 ()-|||-(A) (Acup B)=P(A)+P(B);-|||-(B) (Acup B)=P(A)+P(B)-P(AB);-

[题目]证明 cup (Bcap C)=(Acup B)cap (Acup C)

(1)(overline(AB)cup C)(overline(AC)); (2)(Acup B)(Acupoverline(B)).6.证明:(Acup B

二、化简下列各式-|||-1、 (Acup B)(overline (A)cup B)(Acup overline (B))