1 . 已知等差数列
和正项等比数列
满足:
,
,
.
(1)求数列
的通项公式;
(2)已知数列
满足
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85444874c705666de9488286d3d61dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b55107802dc162ede8c24b91d9313b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1029b93ae7ab7b12df80d50e0b877c5d.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
(2)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解题方法
2 . 已知抛物线
,
为抛物线
上的一个动点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.过点A与抛物线只有一个公共点的直线有且仅有一条 |
B.动点![]() ![]() ![]() |
C.动点![]() ![]() ![]() |
D.过![]() ![]() ![]() ![]() ![]() ![]() |
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3 . 设函数
是定义在
上的可导函数,其导函数为
,且有
,则不等式
的解集为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2edd8edcb21bd41584daf9bb95a5c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7fc858ab3d3ecd62747b97eafdf94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f5e9be0f9b920e5fb165d945c80c6d.png)
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4 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff97f233b88f7db460af8a8d1018bd8.png)
(1)求函数
在点
处的切线方程;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff97f233b88f7db460af8a8d1018bd8.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
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5 . 已知三棱锥
,
是以
为斜边的直角三角形,
是边长为2的等边三角形,且
平面
,则三棱锥
外接球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知椭圆
的左、右焦点分别为
分别为
的上,下顶点,
是
上不同于点A的两点.
(1)求
的值;
(2)记
的面积分别为
,若
,求
的取值范围;
(3)若直线
与
的斜率之和为2,作
,垂足为
,试问:点
是否在一个定圆上?若是,求出该圆的方程;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb42a8c45eaf3b8069acf4906146d266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76a0c59f5b75eb6f2a612f2a1119ba09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01322590eb4e2018a458cb0578d70630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdfc6a59392d1ac3cd89ddc0308864c.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3622c0dc214f9a1694b4c5d263ef2dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21573bf7fbf8f4846dd0bb57921e4f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c360fec104715a3dde04e579cd08ee31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c5ae0e3931f519c6009e13a8d93634e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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7 . 已知函数
.
(1)讨论
的单调性;
(2)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633963c895dbb7e6b1a3f7aa1d97c642.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
8 . 设
分别是双曲线
的左,右焦点,若存在过点
的直线
与
的左支交于
两点,且
为等腰直角三角形,则双曲线的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdce3deea7dc84d1a2119a34863b36ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee45d6726ad642fed2dec3739a3aecb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4e4c7a79d9d3cdb9ac5949d53e33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
您最近一年使用:0次
9 . 已知函数
.
(1)讨论函数
的单调性;
(2)若函数
存在单调递减区间,求实数b的取值范围;
(3)设
是函数
的两个极值点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c00c37fc594c18017bc2696c74dce338.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f921c266a1ffb6ddc69301f4e9c788a7.png)
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解题方法
10 . 已知随机变量
的分布列如下,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514aef3dd8e1fa10b420a03b18a0e376.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514aef3dd8e1fa10b420a03b18a0e376.png)
![]() | ![]() | ![]() | ![]() | ![]() |
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