5 |
2 |
3 |
2 |
1 |
6 |
1 |
3 |
A.{4,5,6} | B.{6,7,8,9} | C.{3,4,5} | D.{3,4,5,6} |
(
|
5 |
2 |
an-a1 |
n-1 |
1 |
n-1 |
1 |
6 |
1 |
3 |
1 |
6 |
1 |
n-1 |
1 |
3 |
A.5≤d<6 | B.d<6 | C.5<d≤6 | D.d>5 |
A.a1+a8>a4+a5 | B.a1+a8=a4+a5 |
C.a1+a8<a4+a5 | D.a1a8=a4a5 |
A.|-
| B.(0,
| C.[-1,0)∪(0,
| D.[-,
|
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