题型:填空题
难度:0.85
引用次数:854
题号:929632
用数学归纳法证明:
,在验证
时,等式左边为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae05205cbf2be2d60f4dcffc6c371cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
更新时间:2012-01-28 16:13:50
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