题目内容
已知:2+
=22×
,3+
=32×
,4+
=42×
,5+
=52×
,…,若10+
=102×
符合前面式子的规律,则a+b=______.
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 8 |
| 3 |
| 8 |
| 4 |
| 15 |
| 4 |
| 15 |
| 5 |
| 24 |
| 5 |
| 24 |
| b |
| a |
| b |
| a |
根据题中材料可知
=
,
∵10+
=102×
∴b=10,a=99
a+b=109.
| b |
| a |
| a |
| a2-1 |
∵10+
| b |
| a |
| b |
| a |
∴b=10,a=99
a+b=109.
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