题目内容
歌德巴赫(Goldbach.C.德.1690-1764)曾研究过“所有形如
(m,n为正整数)的分数之和”问题.为了便于表述,引入记号:
∑n-1φ∑m-1φ
=(
+
+
+…)+(
+
+
+…)+(
+
+
+…)+…写出你对此问题的研究结论:(用数学符号表示).
| 1 |
| (n+1)m+1 |
∑n-1φ∑m-1φ
| 1 |
| (n+1)m+1 |
| 1 |
| 22 |
| 1 |
| 23 |
| 1 |
| 24 |
| 1 |
| 32 |
| 1 |
| 33 |
| 1 |
| 34 |
| 1 |
| (n+1)2 |
| 1 |
| (n+1)3 |
| 1 |
| (n+1)4 |
∵
+
+
+…=
=
,
+
+
+…=
=
…
∴∑n-1φ∑m-1φ
=1-
+
-
+…+
-
…=1
| 1 |
| 22 |
| 1 |
| 23 |
| 1 |
| 24 |
| ||
1-
|
| 1 |
| 2 |
| 1 |
| 32 |
| 1 |
| 33 |
| 1 |
| 34 |
| ||
1-
|
| 1 |
| 2×3 |
∴∑n-1φ∑m-1φ
| 1 |
| (n+1)m+1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| n |
| 1 |
| n+1 |
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