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2 |
A.命题“p∧q”是真命题 | B.命题“p∧非q”是真命题 |
C.命题“非p∧q”是真命题 | D.命题“非p∧q”是假命题 |
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2 |
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2 |
A.p∧¬q | B.¬p∧¬q | C.¬p∧q | D.p∧q |
A.若p,则q | B.若p,则┐q | C.若┐q,则p | D.若┐q,则┐p |
A.①② | B.②③ | C.①②③ | D.③④ |
k |
x |
A.命题”p且q”为真 | B.命题”p或¬q”为假 |
C.命题”p或q”为假 | D.命题”¬p”且”¬q”为假 |
A.命题“若p,则q”与命题“若¬q,则¬p”互为逆否命题 |
B.命题p:∀x∈[0,1],ex≥1,命题q:∃x∈R,x2+x+1<0,则p∨q为真 |
C.若p∨q为假命题,则p、q均为假命题 |
D.“若am2<bm2,则a<b”的逆命题为真命题 |
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