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1 . 设等差数列
的前n项和为Sn,公差为d.已知
,S12>0,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0939caf47d751f8c7139bd0b25fe98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff1508953a6b81848a89411596db8c00.png)
A.![]() | B.![]() |
C.Sn<0时,n的最小值为14 | D.数列![]() |
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2022-12-04更新
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5卷引用:江苏省盐城市第一中学2022-2023学年高二上学期第二次学情调研考试数学试题
江苏省盐城市第一中学2022-2023学年高二上学期第二次学情调研考试数学试题江苏省无锡市南菁高级中学2023-2024学年高二上学期9月调研考试数学试题安徽省合肥市六校联盟2022-2023学年高二下学期期中联考数学试题(已下线)山东省济南市2022-2023学年高三上学期期中数学试题变式题6-10四川省绵阳南山中学2023-2024学年高二下学期期中考试数学试题
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2 . 已知定义在
上函数
满足:当
时,
,且对
都有
.
(1)求
并写出
的奇偶性(直接写,不要过程);
(2)判断
在区间
上的单调性并证明;
(3)已知
,
,若
,对
,总有
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1684ce79f1760a4e0b820e3c4c1822f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0849b99ab2434f60da8dd34f1ed09adb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcba389b30b37674c8b79b4437c88410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd048aa4f6348fe46bcccddaff7ea28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a143121696858090d912913e9a27cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2790d64914815e44823ecdee01779eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
3 . 已知
,方程
有四个不同的根
,且满足
,(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dad16e4910ec15add074c4077b0e86.png)
___________ ;(2)
的取值范围为:___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02eb4d1654c52c273f5711f576ec51ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c77a9531c3fd1d25b927cc29b0ad59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dad16e4910ec15add074c4077b0e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2741ca619df1d9ab3d9ced4c49142dc.png)
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2022-12-03更新
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4 . 设
,(e是自然对数的底数),则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaec3c2b072918dfef6d246b40382fa7.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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4卷引用:江苏省苏州八校联盟2022-2023学年高三上学期第二次适应性检测数学试题
5 . 已知离心率为
的椭圆
的中心在原点
,对称轴为坐标轴,
为左右焦点,
为椭圆上的点,且
.直线
过椭圆外一点
,与椭圆交于
两点,满足
.
(1)求椭圆
的标准方程;
(2)若
,求三角形
面积的取值范围;
(3)对于任意点
,是否总存在唯一的直线
,使得
成立,若存在,求出直线
的斜率;否则说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd236405e907e2a2be452c6b61cc5e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14277e52adebfc9788f35ec74dafbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b44e00b86ad1e900c673fe204701393.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
(3)对于任意点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6004a4d8671dcbd69059617780cd6a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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3卷引用:江苏省南通市如东县2022-2023学年高二上学期12月段考数学试题
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6 . 已知函数
,
.
(1)讨论函数
的单调性;
(2)当
时,设
,
,函数
有两个极值点
、
.
①求
的取值范围;
②若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c0e896e86c9354ed506ab8c9a93342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91979d66329011b1aa6151692b129862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b00f32e1420c0dceaf59ca70b8ec2a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd888afdcfdb3e91a157d50f65e915e.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da198a7ac67e6295c6e8daf00615e872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
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3卷引用:江苏省南通市如东高级中学2022-2023学年高三上学期12月阶段测试数学试题
江苏省南通市如东高级中学2022-2023学年高三上学期12月阶段测试数学试题四川省成都市金苹果锦城第一中学2022-2023学年高三上学期期中考试数学(文)试题(已下线)第六章 导数与不等式恒成立问题 专题九 双变量不等式恒成立问题 微点3 双变量不等式恒成立问题之换元法
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7 . 已知椭圆
:
,
,
分别为它的左右焦点,
,
分别为它的左右顶点,点
是椭圆上的一个动点,下列结论中正确的有
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e78f1a9cc4dedc05c175ab99b288b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2022/11/26/3118093357400064/3119978486153216/STEM/d842d1fd46024b898fccddbc87a880d0.png?resizew=4)
A.存在![]() ![]() |
B.![]() ![]() |
C.![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
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8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f942ee2bdf0e4f17d8562d80059e790f.png)
).
(1)讨论
的单调性;
(2)当
时,关于
的不等式
恒成立,求实数
的取值范围.注:
是自然对数的底数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f942ee2bdf0e4f17d8562d80059e790f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558abe69559cdad16a35768670c800c9.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983cc6ba5d20ab475e4f84de9a56c65d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11204e2fb6e560bf7a4ca26eaebfc526.png)
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9 . 已知
和
分别是函数
的两个极值点,且
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971905ea129aec0ca7c325f60260c7e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd86badb20015aa65328fda1e43a117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2849c745af89b34fb00fc38ca0ea6bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a86d65aab881fdd06a05ce47d09c6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5卷引用:江苏省南京市六校2022-2023学年高三上学期11月联考数学试题
10 . 已知双曲线C:
的左右焦点分别为
,
为坐标原点,
为双曲线右支上的一点,过点
的直线
与右支交于另一点
,且与双曲线的两条渐近线分别交于
两点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268bd52b11f9ad217062dd6361fb2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
A.点![]() | B.![]() |
C.![]() | D.![]() |
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