题目内容
2012×
.
| 2010 |
| 2011 |
2012×
,
=(2011+1)×
,
=2010+
,
=2010
.
| 2010 |
| 2011 |
=(2011+1)×
| 2010 |
| 2011 |
=2010+
| 2010 |
| 2011 |
=2010
| 2010 |
| 2011 |
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