已知函数
,若函数
恰有5个零点,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44052d2d8a7ad6b63b811043d9e48a99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2726a7e3962818f6f9fd25f91ab78817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2021·湖南常德·一模 查看更多[4]
湖南省常德市2021届高三下学期一模数学试题重庆市第六十六中学2020-2021学年高二下学期第二次月考数学试题(已下线)专题6.2 导数中的参数问题 -玩转压轴题,进军满分之2021高考数学选择题填空题重庆市实验中学2022届高三上学期10月月考数学试题
更新时间:2021-04-30 22:50:26
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解题方法
【推荐1】已知函数
函数
有四个不同的零点
,且
,现有下列四个结论:
①
的取值范围是
;②
的取值范围是
;③
;④
.其中所有正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a6d6b48cede6f256943873caf164e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9c82c1ec9a0ff6eec86178962285f5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c54705d32dc6820f1a90eec2225dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc11bb64f754af15ce5271b8c8a1828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4567407acd29384835841b1490ba5a6f.png)
A.①② | B.①③ | C.②③ | D.③④ |
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解题方法
【推荐2】已知函数
,函数
,若函数
有四个零点,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20db5d97cb1e13d4b26528c507a715a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2ccc23f42d6082b5054eb167b29203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐1】已知函数
满足
,且
(
为
的导函数),若对于任意的
,不等式
恒成立,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722bd4c028154ea78b5166d243c5152b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8325f59347714ffe7f7c6c45aa49ec9c.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】对任意实数x,y,定义运算
,设
,
,
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b056ccfa47ae89033d6bb3f1d428d77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfca2763430b0609485946ad77398cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2ce97ebf4eee417ce63a523b0dc43b.png)
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A.a | B.b | C.c | D.不能确定 |
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【推荐1】用符号
表示不超过
的最大整数,例如:
,
,
.设函数
有三个零点
,
,且
,则
的取值范围是( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed90daa08b15619306e7b8341c115f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b54932e253453ab659339feab656cfc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b8ec9d4206ea66a02de5c4a1e1e911.png)
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【推荐2】函数
(
,e是自然对数的底数,
)存在唯一的零点,则实数a的取值范围为
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