已知
,用数学归纳法证明
时,从假设
推证
成立时,需在左边的表达式上多加的项数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f439d411c9198114a08908fd292b80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a31f0be7bcd2c9657b84421d6a78124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
A.![]() | B.![]() | C.![]() | D.1 |
更新时间:2019-08-12 18:02:39
|
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【推荐1】已知数列
满足
,
,n=3,4,…,若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ffbc15efa24dc63e2b83cf22980a1cf.png)
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A.![]() | B.3 | C.4 | D.5 |
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单选题
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适中
(0.65)
【推荐2】利用数学归纳法证明不等式
的过程中,由
到
时,不等式的左边增加的项数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d382ae1e4caa0aa7d59e7d9c5956f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef7ca2b3e8061384501f668e59696a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ba21f3d0cfc86d40e2e06446623ce0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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