1 |
a1•a2 |
1 |
a2•a3 |
1 |
a100•a101 |
A.
| B.
| C.
| D.
|
1 |
an•an+1 |
1 |
(2n-1)(2n+1) |
1 |
2 |
1 |
2n-1 |
1 |
2n+1 |
1 |
a1•a2 |
1 |
a2•a3 |
1 |
a100•a101 |
1 |
2 |
1 |
201 |
100 |
201 |
1 |
2 |
1 |
4n+2100 |
A.2010 | B.2011 | C.1 | D.0 |
A.2 | B.-1 | C.-2 | D.1 |
1 |
an |
A.(0,
| B.[
| C.(
| D.[
|
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