1 |
an•an+1 |
lim |
n→∞ |
1 |
an•an+1 |
1 |
(2n-1)(2n+1) |
1 |
2 |
1 |
2n-1 |
1 |
2n+1 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
2n-1 |
1 |
2n+1 |
n |
2n+1 |
lim |
n→∞ |
1 |
2 |
m |
2m+1 |
1 |
3 |
n |
2n+1 |
3 |
n |
-2m2+4m+1 |
m2 |
| ||
2 |
| ||
2 |
an |
2n |
x | 2 |
A.-2 | B.-
| C.±
| D.
|
A.
| B.2 | C.4 | D.2
|
1 |
3+b1 |
1 |
3+b2 |
1 |
3+b3 |
1 |
3+bn |
1 |
2 |
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