题干
求证：1﹣
+
﹣
+…+
﹣
=
+
+…+
，n∈N*．
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| 1 |
| 4 |
| 1 |
| 2 |
| n |
| 1 |
| 1 |
| 2 |
| n |
| 1 |
| n |
| + |
| 1 |
| 1 |
| n |
| + |
| 2 |
| 1 |
| 2 |
| n |
答案(点此获取答案解析）
证明：1﹣
+
{#/math
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| 1 |
| 3 |
