1 . 已知函数
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ca1100b456583c791b802ea0b12cda.png)
A.若函数图象过原点,则![]() |
B.若函数图象关于![]() ![]() |
C.若函数在零点处的切线斜率为1或![]() ![]() |
D.存在![]() ![]() ![]() |
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解题方法
2 . 已知复数
是方程
的两根,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d860cb86e1467ac24010aecfc7a425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235a1f150b8c1eaca40896bb173378dd.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 椭圆
的左右焦点分别为
,点
,线段
,
分别交
于
两点,过点
作
的切线交
于
,且
,则
的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ae4fe9b5d37dc90293deb0dd351527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c8d1d95b03751deddcc1a21745f9f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4e4c7a79d9d3cdb9ac5949d53e33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dff3ca1ac53e0fcf3ca6058abae131d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 若曲线
与
恰有两条公切线,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43500678e0aba349d2cc42f91b5cbe25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9c127fef6f5aa84512b06539c9d77ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e682f8aedfc246f44520781e77d335a4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知等差数列
的前
项和为
,满足
,则
( )
![](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/a7d3dfb0184eb10eb1f92be86fb46c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7020cf98fa9b1c2458105199fb22197c.png)
A.-200 | B.-100 | C.200 | D.100 |
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7 . 已知
是两条不同的直线,
是三个不同的平面,则下列命题是真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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8 . 从一个含有
个个体的总体中抽取一容量为
的样本,当选取抽签法、随机数法和分层随机抽样三种不同方法时,总体中每个个体被抽中的概率分别为
,三者关系可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9bf0198e73b44944ce7a45411899f49.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 已知集合
,则图中阴影部分表示的集合为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f56625a02dc4cf2a6f1a5bfcb7150f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 已知双曲线
的实轴长为2,离心率为2,右焦点为
,
为
上的一个动点,
(1)若点
在双曲线
右支上,在
轴的负半轴上是否存在定点
.使得
?若存在,求出点
的坐标;若不存在,请说明理由.
(2)过
作圆
的两条切线
,若切线
分别与
相交于另外的两点
、
,证明:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a6b915acceebea47b3fc9e902755557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdcbaa80a48affc347be5a1bb5079a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50297ad9f7256b4d2efc3462289f18b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50297ad9f7256b4d2efc3462289f18b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aaf867a11ac4014b51f564478f01f4b.png)
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