题干
观察下列各式：1+
+
= 1+
，1+
+
= 1+
，1+
+
= 1+
，
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 1 |
| 1 |
| × |
| 2 |
| 1 |
| 2 |
| 2 |
| 1 |
| 3 |
| 2 |
| 1 |
| 2 |
| × |
| 3 |
| 1 |
| 3 |
| 2 |
| 1 |
| 4 |
| 2 |
| 1 |
| 3 |
| × |
| 4 |
……
请利用你所发现的规律，
计算 1+
+
+ 1+
+
+ 1+
+
+…+ 1+
+
，其结果为____．
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 1 |
| 2 |
| 2 |
| 1 |
| 3 |
| 2 |
| 1 |
| 3 |
| 2 |
| 1 |
| 4 |
| 2 |
| 1 |
| 9 |
| 2 |
| 1 |
| 2 |
答案(点此获取答案解析）
9
| 9 |
