2011·广东·一模
1 . 对大于或等于2的自然数的正整数幂运算有如下分解方式:
22=1+3 32=1+3+5 42=1+3+5+7
23=3+5 33=7+9+11 43=13+15+17+19
根据上述分解规律,若
,
的分解中最小的正整数是21,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
22=1+3 32=1+3+5 42=1+3+5+7
23=3+5 33=7+9+11 43=13+15+17+19
根据上述分解规律,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/007b1dc297f3fd58acc4f14cde032575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411a315870ed3e6d0e8ea885f1a04bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10-11高二下·安徽亳州·期末
2 . 在数列
中,
,且前
项的算术平均数等于第
项的
倍
.
(1)写出此数列的前
项;
(2)归纳猜想
的通项公式,并用数学归纳法证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87670af2d245aaff0dbeef2c56d0ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d292dde9fb0b3ab8259082569876a8.png)
(1)写出此数列的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
(2)归纳猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
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11-12高二下·安徽宿州·期中
3 . 用数学归纳法证明
(
)时,从“
到
”左边需增乘的代数式为
![](https://img.xkw.com/dksih/QBM/2014/6/16/1571775569362944/1571775574810624/STEM/0edc9c3042834ab1a8c8ac3a2bd90f0e.png)
![](https://img.xkw.com/dksih/QBM/2014/6/16/1571775569362944/1571775574810624/STEM/c1047b78d1504a43a498fbc8a4edfff6.png)
![](https://img.xkw.com/dksih/QBM/2014/6/16/1571775569362944/1571775574810624/STEM/f8d95859e4c34df0b078e6dac4aa1f05.png)
![](https://img.xkw.com/dksih/QBM/2014/6/16/1571775569362944/1571775574810624/STEM/d3137a936b744bbc940b7576d6b99dc9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-12-01更新
|
904次组卷
|
6卷引用:2015-2016学年江西省宜春市奉新一中高二下第一次月考理科数学试卷
2015-2016学年江西省宜春市奉新一中高二下第一次月考理科数学试卷(已下线)2011-2012学年安徽省宿州市高二下学期期中质量检测理科数学试卷(已下线)2011-2012学年山东省济宁市梁山一中高二下学期期中理科数学试卷(已下线)2011—2012学年甘肃省张掖二中高二下学期期中理科数学试卷(已下线)2013-2014学年湖北省部分重点中学高二下学期期中考试理科数学试卷(已下线)专题6.6 数学归纳法 (练)-浙江版《2020年高考一轮复习讲练测》
11-12高二·江西上饶·阶段练习
4 . 在数列{an}中,a1=1,当n≥2时,an,Sn,Sn-
成等比数列.
(1)求a2,a3,a4,并推出an的表达式;(2)用数学归纳法证明所得的结论;
(3)求数列{an}前n项的和.
![](https://img.xkw.com/dksih/QBM/2012/3/21/1570813472980992/1570813478404096/STEM/2a97a109cf124ce3b0d5061a735693a9.png)
(1)求a2,a3,a4,并推出an的表达式;(2)用数学归纳法证明所得的结论;
(3)求数列{an}前n项的和.
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11-12高三·安徽宿州·阶段练习
解题方法
5 . 已知数列
的前
项和
与
满足
,其中
是与
无关的常数,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e7bffaae768907ed8edf87fe2cd785.png)
(1)求
;
(2)求
和
的关系式;
(3)猜想用
和
表示
的表达式(须化简),并证明之.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e77e55e18edbadc764c3885916703a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e7bffaae768907ed8edf87fe2cd785.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0158862238e250d2a2598b7d4ecd148.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7230de53663c75658c58bbf206a0085.png)
(3)猜想用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
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