题目内容
计算
+
+
+…+
=______.
1+
|
1+
|
1+
|
1+
|
原式=
+
+
+
+…+
,
=1+1-
+1+
-
+1+
-
+1+
-
…+1+
-
,
=2010+(1-
+
-
+
-…+
-
),
=2010+(1-
),
=2010
.
| 3 |
| 2 |
| 7 |
| 6 |
| 13 |
| 12 |
| 21 |
| 20 |
| 20102+2010+1 |
| 2010(2010+1) |
=1+1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 2010 |
| 1 |
| 2011 |
=2010+(1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 2010 |
| 1 |
| 2011 |
=2010+(1-
| 1 |
| 2011 |
=2010
| 2010 |
| 2011 |
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