1 . 已知正实数列
满足
,当
时,记集合
,且集合
中的最大元素为
.
(1)若
,求数列
的通项公式;
(2)记数列前n项和为
,证明:存在正实数
,对于任意的正实数
与整数n>1,都有
.注:对于任意实数a,b,定义
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b321b66145a2ed6b30d30b62fd8acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7afe76f3b456f040fef0d89e0f2996f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191a66915ee31c2c7e0a0ace99df4586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记数列前n项和为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bc85af36f64be115dd7c5d88fac6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0158862238e250d2a2598b7d4ecd148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c0e8564359b3f5bd268ab136314f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478e75f2162f25b93d4c337e2829fc05.png)
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2 . 设等差数列
,
,…,
(
,
)的公差为
,满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad43ed5aedc06ea167930e5dbaa09f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3aa7d4a317fd73a233c5f02e38056db.png)
,则下列说法正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad43ed5aedc06ea167930e5dbaa09f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3aa7d4a317fd73a233c5f02e38056db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a70f94c50d71504725066f4e57539a38.png)
A.![]() | B.![]() |
C.存在![]() ![]() | D.![]() ![]() |
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2019-10-18更新
|
2615次组卷
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10卷引用:2019年10月浙江省金丽衢十二校零模数学试题
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