A.对于等比数列{an}而言,若m+n=k+S,m、n、k、S∈N*,则有am•an=ak•aS | ||||||||||||
B.点(-
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C.若|
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D.“sinα=sinβ”的充要条件是“α+β=(2k+1)π或α-β=2kπ (k∈Z)” |
π |
4 |
kπ |
2 |
π |
8 |
a |
b |
a |
b |
b |
a |
b |
1 |
2 |
1 |
2 |
2 |
n |
n |
n |
n |
n |
n |
n |
n |
n |
b |
c |
a |
b |
c |
n |
a |
A.1个 | B.2个 | C.3个 | D.4个 |
A.∃x0∈R,ex0≤0 | ||
B.∀x∈R,2x>x2 | ||
C.
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D.a>2,b>1是ab>2的充要条件 |
A.p∧q | B.¬p∧q | C.¬p∨q | D.p∨q |
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