题目内容
| lim |
| n→∞ |
1+
| ||||
1+
|
| A.0 | B.
| C.
| D.1 |
∵1+
+…+
=
=2-
.
1+
+…+
=
=4-
.
∴
=
=
=
,
故选C.
| 1 |
| 2 |
| 1 |
| 2n |
1-(
| ||
1-
|
| 1 |
| 2n-1 |
1+
| 1 |
| 4 |
| 1 |
| 4n |
1-(
| ||
1-
|
| 1 |
| 4n-1 |
∴
| lim |
| n→∞ |
1+
| ||||
1+
|
| lim |
| n→∞ |
2-
| ||
4-
|
| 2-0 |
| 4-0 |
| 1 |
| 2 |
故选C.
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