名校
1 . 选修4-5:不等式选讲
已知函数.
(Ⅰ)若,求实数
的取值范围;
(Ⅱ)对任意恒成立,求实数
的值.
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解题方法
2 . 已知函数
.
(1)若不等式
有解,求实数
的最小值
;
(2)在(1)的条件下,若正数
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daaad85b1ca7a1d8e034681ac25c7a4.png)
(1)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29d8a43948e858bc50fa6bca8772842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)在(1)的条件下,若正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d935d6d93697b2692c01aaa285c705b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e58f2890dd9282ef257340e7c092de9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7176c2f40d503d68b08abe58ea033d09.png)
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3 . 在各项均为正数的等比数列
中,
,且
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f267f90d47313f7e2f9f97ce6d418b.png)
(Ⅰ)求等比数列的通项公式;
(Ⅱ)若数列满足
,数列
的前
项和为
,求证:
.
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4 . 已知圆
:
和两点
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd287af061132ab5f1ab15659fadb424.png)
,若圆
上存在点
,使得
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1ede100b3bf66fee54f97db04c5a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a57f36786de1812ceff66759ed61e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd287af061132ab5f1ab15659fadb424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a363df9127fb019f87ec53470c50dcc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39968c817c99d828493beaad1443425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知数列
为等比数列,且
,则
的最小值为______________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2161989612ef797055c9ab4ce3974d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e514988b2e6db3ca95ba0e56f2a6859c.png)
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6 . 以下四个命题中是假命题的是
A.“昆虫都是6条腿,竹节虫是昆虫,所以竹节虫有6条腿”此推理属于演绎推理. |
B.“在平面中,对于三条不同的直线![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.“![]() ![]() |
D.若![]() ![]() ![]() |
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7 . 已知
是椭圆
和双曲线
的公共顶点,其中
,
是双曲线上的动点,
是椭圆上的动点(
都异于
),且满足
(
),设直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc180d2aa5b1deb6880cde706c803e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc6a509ba407b74d8b5376cfd3cf508.png)
的斜率分别为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141c2cdc70061cfa9fb7283fd83047ec.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ffbc423070f5d7ce2c72229066ee1cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cffa571d9bf961e7496a98a03d0105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bd9736828195f010db4e1f0a9dea7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc180d2aa5b1deb6880cde706c803e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc6a509ba407b74d8b5376cfd3cf508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c65902e35640cf2c8d4111c36b40145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f67adc50da8dbe78a6c75bfa79017a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141c2cdc70061cfa9fb7283fd83047ec.png)
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5卷引用:2017届吉林省吉林市普通高中高三下学期第三次调研测试数学(理)试卷
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8 . 已知全集
,集合
,
,
.
(1)
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a64dc61989ca50b9ee19d835c4ed268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16332230391b6c4a125549172854643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43aef9e855eee5812a4cd436aefa4734.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e9b09ec26c348df4a206fce617babe0.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c5e00c0716742d29b5814b83e07528.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07241606934d6c75cf04455979d0e1b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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9 . 给出下列命题:
①若函数
满足
,则函数
的图象关于直线
对称;
②点
关于直线
的对称点为
;
③通过回归方程
可以估计和观测变量的取值和变化趋势;
④正弦函数是奇函数,
是正弦函数,所以
是奇函数,上述推理错误的原因是大前提不正确.
其中真命题的序号是__________ .
①若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5c154f95ef32e12905edc3174c1970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485d6818209795b61f4dedb9801f754b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b979396a703fb14715ba39232f5786a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a6106e20701c1126072050e181dedf3.png)
③通过回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/929ef3bed0a4bdd22f39e036506dc481.png)
④正弦函数是奇函数,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20bdd870f7bc7cae93141d101b1150b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20bdd870f7bc7cae93141d101b1150b7.png)
其中真命题的序号是
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2011·福建泉州·三模
10 . 现有四个函数:①
;②
;③
;④
的图象(部分)如下,但顺序被打乱,则按照从左到右将图象对应的函数序号安排正确的一组是
![](https://img.xkw.com/dksih/QBM/2017/2/7/1619490039840768/1619490040102912/STEM/9588d15351144802b7056ddb9a18e418.png)
![](https://img.xkw.com/dksih/QBM/2017/2/7/1619490039840768/1619490040102912/STEM/c3166465956548b0957886a21668ab78.png)
![](https://img.xkw.com/dksih/QBM/2017/2/7/1619490039840768/1619490040102912/STEM/3fbe720732b9471f84ffb91bed3c20ec.png)
![](https://img.xkw.com/dksih/QBM/2017/2/7/1619490039840768/1619490040102912/STEM/adb4a515d63241939ade9ffd6eca47a6.png)
![](https://img.xkw.com/dksih/QBM/2017/2/7/1619490039840768/1619490040102912/STEM/2c64248ed38847818bd11fae7d2ba9ae.png)
![](https://img.xkw.com/dksih/QBM/2017/2/7/1619490039840768/1619490040102912/STEM/9588d15351144802b7056ddb9a18e418.png)
A.④①②③ | B.①④③② | C.①④②③ | D.③④②① |
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7卷引用:2015届吉林省吉林市一中高三3月教学质量检测一文科数学试卷
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