题目内容
设s=
+
+…+
,求[
]=______.
| 1 | ||
|
| 1 | ||
|
| 1 | ||
|
| s |
S=
+
+…+
,
<
+
+
+…+
,
=2(1+
-1+
-
+…+
-
),
=2
,
=2000,
∴
=
=20
≈44.7,
∴[
]=44.
| 1 | ||
|
| 1 | ||
|
| 1 | ||
|
<
| 2 | ||
|
| 2 | ||||
|
| 2 | ||||
|
| 2 | ||||
|
=2(1+
| 2 |
| 3 |
| 2 |
| 106 |
| 106-1 |
=2
| 106 |
=2000,
∴
| s |
| 2000 |
| 5 |
∴[
| s |
练习册系列答案
相关题目