题目内容
已知2+
=22×
,3+
=32×
,4+
=42×
…,若8+
=82×
(a,b为正整数),则a+b=______.
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 3 |
| 8 |
| 4 |
| 15 |
| 4 |
| 15 |
| a |
| b |
| a |
| b |
根据题意可知a=8,b=82-1=63,
∴a+b=71.
∴a+b=71.
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题目内容
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 3 |
| 8 |
| 4 |
| 15 |
| 4 |
| 15 |
| a |
| b |
| a |
| b |