题目内容
1-
=
1-
-
=
1-
-
-
=
1-
-
-
-
﹦
1-
-
-
-
-
﹦
1-
-
-
-
-…-
﹦
1-
-
-
-
-…-
﹦
.
| 1 |
| 2 |
| 1 |
| 2 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 4 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 8 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 16 |
| 1 |
| 16 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
| 1 |
| 32 |
| 1 |
| 32 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 128 |
| 1 |
| 128 |
| 1 |
| 128 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 256 |
| 1 |
| 256 |
| 1 |
| 256 |
分析:观察给出的式子,当1连续减去2的1次方的倒数,2的平方的倒数,2的立方的倒数…结果等于最后减去的那个数.
解答:解:1-
-
-
-
﹦
,
1-
-
-
-
-
﹦
,
1-
-
-
-
-…-
﹦
,
1-
-
-
-
-…-
﹦
;
故答案为:
,
,
,
.
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 16 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
| 1 |
| 32 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 128 |
| 1 |
| 128 |
1-
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 256 |
| 1 |
| 256 |
故答案为:
| 1 |
| 16 |
| 1 |
| 32 |
| 1 |
| 128 |
| 1 |
| 256 |
点评:关键是根据给出的式子,找出规律,再根据规律解决问题.
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