1 . 已知函数
,曲线
关于直线
对称.现给出如结论:
①若
,则存在
,使
;
②若
,则不等式
的解集为
;
③若
,且
是曲线
的一条切线,则
的取值范围是
.
其中正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc6e2586c098f113adaf6d44188fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679e5c7077b9d6d37f469575fc0ba650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13747fa9a42164caebe2c9b7c5d06d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f34d440343370918f1e4d6770bcc2a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57824da76d23e3c2628921c3cff4ca21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9663fd1d663eba8ef28ce8566eae9b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813e9df9498d8255b38b623290b71290.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dafd25e9ad1e3de60868fd0602e07b21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1848f7d18bb7e4816dc0488c4e23954d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12dd4d9f8425b4b5fbc614a61a3e9558.png)
其中正确结论的个数为( )
A.0 | B.1 | C.2 | D.3 |
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2018-04-29更新
|
1939次组卷
|
2卷引用:【全国市级联考】广东省佛山市普通高中2018届高三教学质量检测(二)(文科)数学试题
解题方法
2 . 已知函数
.
(1)若曲线
与曲线
在它们的某个交点处具有公共切线,求
的值;
(2)若存在实数b使不等式
的解集为
,求实数
的取值范围;
(3)若方程
有三个不同的解
,且它们可以构成等差数列,写出实数
的值(只需写出结果).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e34d863254025398daac0679fa754c.png)
(1)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若存在实数b使不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab42740d8f095b5f7825d14c4c312096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1324e9a9dad075dfe411b69e34bf180b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8bfb563f79688d136e0cb958b5153c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2018-04-03更新
|
634次组卷
|
2卷引用:2017北京市北京19中高三文十月月考试题
3 . 已知函数
.
(1)求不等式
的解集;
(2)函数
,若存在
,使得
成立,求实数
的取值范围;
(3)若函数
,讨论函数
的零点个数(直接写出答案,不要求写出解题过程).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/974d9aea54bbdc92508998a882e4f9f5.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31b687247b7ca16a7813e3881d18a52.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d92eafe586ba8507634140cc46189de9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45745b3b43bcc8c406bac90ce9bcf3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29f5020d133f458912dc3da22b8127d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a715aa8abbb74229e692aa7f28d00b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df376a283f245976966c89bf1d7ae461.png)
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4 . 已知函数
.
(1)若函数
的图象有平行于坐标轴的公切线,求
的值;
(2)若关于
的不等式
的解集中有且只有两个整数,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9659c43653da8a84f67843e7d4150d66.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b3d02eb18d246f3039cb93a1e10d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49770a5e54f5c8b7be4d0af8182efa7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 设命题P:关于
的不等式:
的解集是R,命题Q:函数
的定义域为R,若P或Q为真,P且Q为假,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571961543532544/1571961549389824/STEM/7a3b18c53d7f4faa989e36ab0db39f0a.png)
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571961543532544/1571961549389824/STEM/235fac6639744b2d879bd31dd891cc98.png)
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571961543532544/1571961549389824/STEM/0e298600a48946138de23b70c8caa4ee.png)
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571961543532544/1571961549389824/STEM/ebbe983e04df4ff387bf23467498ddd4.png)
您最近一年使用:0次
2016-12-03更新
|
758次组卷
|
2卷引用:2015届江西省吉安市一中高三上学期期中考试理科数学试卷
10-11高一上·河北唐山·期中
6 . 已知二次函数
的二次项系数为
,且不等式
的解集为
.(Ⅰ)若方程
有两个相等的根,求
的解析式;
(Ⅱ)若
的最大值为正数,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/5afd8ccce8df4366a0a2efd33148fe40.png)
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/e35b1eb760fe47899e1317ef73ebcd1f.png)
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/fd769518d35c4298aa6b758338254039.png)
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/1228d6aee4ff46eeb1260660fbc06218.png)
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/8f9828c5819c4cfe9feacf27b3cdcdbe.png)
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/5afd8ccce8df4366a0a2efd33148fe40.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/5afd8ccce8df4366a0a2efd33148fe40.png)
![](https://img.xkw.com/dksih/QBM/2012/1/6/1570679833305088/1570679838900224/STEM/e35b1eb760fe47899e1317ef73ebcd1f.png)
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2010·河北衡水·三模
7 . 给出下列命题:
①已知函数
在点x=1处连续,则a=4;
②若不等式|x+
|>|a﹣2|+1对于一切非零实数x均成立,则实数a的取值范围是1<a<3;
③不等式(x﹣2)|x2﹣2x﹣8|≥0的解集是{x|x≥2}
④如果△A1B1C1的三个内角的余弦值分别等于△A2B2C2的三个内角的正弦值,则△A1B1C1为锐角三角形,△A2B2C2为钝角三角形.
其中真命题的序号是__ (将所有真命题的序号都填上)
①已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7e90b726aeb9f49b96ddd6555643f0.png)
②若不等式|x+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf35027e76f8ea593f82023973d4aba3.png)
③不等式(x﹣2)|x2﹣2x﹣8|≥0的解集是{x|x≥2}
④如果△A1B1C1的三个内角的余弦值分别等于△A2B2C2的三个内角的正弦值,则△A1B1C1为锐角三角形,△A2B2C2为钝角三角形.
其中真命题的序号是
您最近一年使用:0次