k |
2 |
1 |
4 |
k |
4 |
1 |
2 |
A.A=B | B.A⊊B | C.B⊊A | D.A∩B=∅ |
m |
2 |
1 |
2 |
m |
2 |
1 |
4 |
k |
2 |
1 |
4 |
k |
2 |
1 |
4 |
2k+1 |
4 |
k |
4 |
1 |
2 |
k+2 |
4 |
A.(-∞,+∞) | B.(-∞,0)∪(0,+∞) |
C.(-∞,1)∪(1,+∞) | D.(-∞,0)∪(0,1)∪(1,+∞) |
1 |
2 |
A.a<
| B.a≤
| C.a≤1 | D.a<1 |
A.P⊆Q | B.Q⊆P | C.P⊆∁RQ | D.Q⊆∁RP |
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