解题方法
1 . 函数
,若方程
有三个根,且
是
和
的等差中项,则a=___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4d6430ecef696455ae7de30a50fffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a3bc83c74212c8a4f81963d4972fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e010ae1e3a31fe1008d7ba1238cc832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
您最近一年使用:0次
2020-07-24更新
|
1449次组卷
|
2卷引用:浙江省2020届高三新高考模拟试题心态卷数学试题
2 . 已知抛物线
,焦点为F,过
外一点Q(不在x轴上),作
的两条切线,切点分别为A,B,直线QA,QB分别交y轴于C,D两点,记
的外心为M,
的外心为T.
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505227466358784/2507260326993920/STEM/0f056d8f20df4f808808bf8164e2baf9.png?resizew=180)
(1)若
,求线段CF的长度;
(2)当点Q在曲线
上运动时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1354240a807d0da2b51a19e055140165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e8c7968d57d2a20065a7cb15c9b4eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e9b8a991d00fdd2810dda7adc54fd8.png)
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505227466358784/2507260326993920/STEM/0f056d8f20df4f808808bf8164e2baf9.png?resizew=180)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d609cb7f8b4d79e8b65c0b8a0672d240.png)
(2)当点Q在曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849d513ba68f8904db5f0ed07c7ea208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882d6277e7f4e9c7b32c4f3fb5933290.png)
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名校
解题方法
3 . 如图,直三棱柱
的底面是边长为6的等边三角形,侧棱长为2,E是棱BC上的动点,F是棱
上靠近
点的三分点,M是棱
上的动点,则二面角
的正切值不可能 是( )
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505227520450560/2507254581477376/STEM/e51cc2a3-4d48-4922-8604-dc58b6e6a85a.png?resizew=301)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b34e50806bed5478af535e4553e5ee5.png)
![](https://img.xkw.com/dksih/QBM/2020/7/13/2505227520450560/2507254581477376/STEM/e51cc2a3-4d48-4922-8604-dc58b6e6a85a.png?resizew=301)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-07-16更新
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1195次组卷
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2卷引用:浙江省杭州市2019-2020学年高二下学期期末教学质量检测数学试题
4 . 设函数
,
.
(1)若
在
上仅有一个零点,求a的取值范围;
(2)若
,试讨论方程
在
上的根的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9cae26b3d57d09517fe54ccc64c517a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338fb68ad98f96b76e49c2810144fc08.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055365d21f92fdb6881310bda08c3f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
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5 . 已知函数
,
,记函数g(x)和h(x)的零点个数分别是M ,N,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccb1ee5ef5f730b0fb0218ceac5823b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96104d1145a1ba7d5989d581bbdb538e.png)
A.若M=1,则N≤2 | B.若M=2,则N≥2 |
C.若M=3,则N=4 | D.若N=3,则M=2 |
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解题方法
6 . 已知函数
.
(1)当
时,求f(x)的最小值;
(2)若
对任意的
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e450fb7162f7e08868967ab202e9f2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b33e709fa07350ca836257148a9f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4318a47d7e83d587e74bab4d3d1f6883.png)
您最近一年使用:0次
名校
解题方法
7 . 已知函数
,
,
、
、
.
(1)当
时,
与
在
处有共同的切线,求
、
的值;
(2)设函数
在
处取得极大值
,在
和
处取得极小值
和
,若
成立,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21b9641290411d7c4dd5a08cbf0b481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512ac3ba1757f0a86b339e335c9f783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a0ad70584ca1e1e9cb9178a0ac1c9e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6fb9279934e1e62459dc2f08e32906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77424dbdd740737b4ec75d62cdd08b27.png)
![](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/c3cd156f0ab0fe9bd3bc70731765d72e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9775af58281d3cf46656ae9dfbb4213.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ed5d27c55f011a2a32ef5fdfd55eb3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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8 . 已知函数
,其中
,是自然对数的底数.
(1)当
时,证明:
是
的一个极小值点;
(2)若
在区间
上的最小值为1,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b97115f4f05d80ba09842879b93a290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae6bf7c3198cdd4dafc81e3992f34bd2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001ced1ead625017c92528a0bb1b8901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解题方法
9 . 已知函数
,
,设
的最大值为
,若
的最小值为
时,则
的值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bbfff3e69f32bf56e006ed6f1052a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7dbb416ec1ff1984a724a4f48bf692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
10 . 已知函数
,
.
(Ⅰ)若
,解不等式
;
(Ⅱ)设
是函数
的四个不同的零点,问是否存在实数
,使得其三个零点成等差数列?若存在,求出所有
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e49948cb5d0925be201ed086845f1d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fcc1dbd7485c0ff2a6e1ad4d871d34.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e9fa864472349a0094a4c8328e4536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190a6120c3330c51d0823c8bd8991b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-11-08更新
|
813次组卷
|
5卷引用:浙江省丽水市2018-2019学年高一下学期期末数学试题
浙江省丽水市2018-2019学年高一下学期期末数学试题(已下线)【新东方】杭州新东方高中数学试卷323广东省执信中学2019-2020学年高二上学期9月月考数学试题浙江省宁波市北仑中学2022-2023学年高二(1班)下学期期中数学试题(已下线)第23讲 零点问题之三个零点-突破2022年新高考数学导数压轴解答题精选精练