1 . 对任意
,定义
,其中
,
为正整数.
(1)求
,
的值;
(2)求证:
;
(3)设
是否存在实数
,使得
对任意
恒成立?若存在,求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa9c329ac53eb2023e30a6b818c93d0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f04dc034b37dcd72288ddcbe9e9544b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ee581ca3282490206a8bc11dfb5ccf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11685ad5ffa1806e1317e10b2a7a677.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c2a5f8ec179b72b201c3c0a670612a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be362dec96173f246ff747264007817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44c1ee809263c61d141e0fa93ff5a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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名校
2 . 设二项展开式
的整数部分为
,小数部分为
.
(1)计算
,
的值;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05889f40a3445ef346269aae7fbbd6f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab35850dbc661ded6456b70767cc6cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3087eeade429d61a5daf5b3921f2c95.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42df3c4d4d6760a1f5705a2d0096e62.png)
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2020-06-30更新
|
617次组卷
|
3卷引用:江苏省扬州中学2020届高三下学期6月模拟考试数学试题
解题方法
3 . 若有穷数列
共有
项
,且
,
,当
时恒成立.设
.
(1)求
,
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc193edab5fe17c89ba2ba6b1b4595f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6281305eb310c4e6138912d15af34e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1339d59bd8ab91843aa455b955af5b8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6593bee36f6d93179bcf9a216cfc1ee5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/155c5f3a5c55e0c95191c5a893f63062.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a996c4e29bcc381353e072eb04c11b0.png)
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解题方法
4 . 记
为
二项展开式中的
项的系数,其中
.
(1)求
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3bf2007903adc64d089a054c2284a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc3963f84424c1276294c0faf66b380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d800f03de80068a1172beac3a2c75587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc263351b9ca99a0377fd825e2636db4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb9a94a727b3d85b4a88c729c8694ac.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bc5881ae357ed898e1760ef83bcfd4.png)
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名校
5 . (1)已知
,求
的值.
(2)已知
的展开式中,各项的系数和比各项的二项式系数和大992.求展开式中系数最大的项.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2dcbe0bdfce1a528e71e86a2931c2a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c07cbfbfd1d255399cdfdb62d301be.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7ae0bd0ce0892d96bf9ebb9f02126f.png)
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6 . 设
,
是正整数,
.
(1)证明:
;
(2)比较
和
的大小,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164a3b2fe09f96e9adbac96de24cc4d6.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc35a1a6558499dbf8e368682bf46f52.png)
(2)比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417b7ede44985b47d255e0bc88e194d1.png)
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名校
7 . 若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48a83346aa10ec99f2f97d73f8cbe9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d24d5828b34d96677a4935168cb1364.png)
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名校
8 . (1)在等差数列
和等比数列
中,
,是否存在正整数
,使得数列
的所有项都在数列
中,若存在,求出所有的
,若不存在,说明理由;
(2)已知当
时,有
,根据此信息,若对任意
,都有
,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf82c1e9501358a78d5dde6f32fd2d8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)已知当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358b212c1a075d80c221c0df5b72c8d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1e39dc65e132fa83c02cd0d91168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358b212c1a075d80c221c0df5b72c8d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ef8f0a683e12d585877db46d28933b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e35eeaabd951fb09b2926807da3685b.png)
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9 . 记![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5825bcd6980f86bbf295e8875192220b.png)
.
(1)求方程
的实数根;
(2)设
,
,
均为正整数,且
为最简根式,若存在
,使得
可唯一表示为
的形式
,试求椭圆
的焦点坐标;
(3)已知
,是否存在
,使得
成立,若存在,试求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5825bcd6980f86bbf295e8875192220b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134766c3eda3610d6b2c430f88c5907b.png)
(1)求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f114ac32d8c3870e496e435ef12b1acb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c1116ce7f5a1a7b57517276d5092fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d647fdc847206596ec8b2b80dcf6cac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe82c5d97f1ef217d78164ab7b1e9820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099c847875668a218c7e0df4e4c4b89c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00da6fa15cee05833d0e55d2a27c8586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f159deef7d9e0f5b4658ff0a1c107ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19e7eb4a3aeadc276db57f10016f861b.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edde5273ca915349f4425a60a0d7204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e494dbc2b25ffa7b7ca0e41faefe4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4c8441479fd0a1770b36f2baa95187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c44826e58f11a58d3a6c233fc5df2d.png)
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10 . 对于给定的函数
,定义如下:
其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c7aab4df25884973273efae244f2df.png)
(1)当
时,求证:
;
(2)当
时,比较
与
的大小
(3)当
时,求
的不为
的零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729065c88ccb1ca1071319a4dfb04fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c7aab4df25884973273efae244f2df.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28638f8c054a7bb4d9b46fde330bc76f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5d30d6d24314d9d2925cdc33b04815.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e44284cb19805a584880a686ac3df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08bfbf2be4f1b96be108b9c1b7e82262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed70ca50c63a55128f61af3e3ac8f453.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b1c079afd1b058adc67a50f48f3d466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89220eb96a4757f2988362bc04e80c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
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