已知函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)证明:当
时,
有且只有一个零点;
(3)若
在区间
各恰有一个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d2345aac6817314e2f7c3d786b79f1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3a34d6f60032718820c3da2b07786b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62be04c7b2b2744afea6e0c28ecc67f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
21-22高二下·浙江台州·期末 查看更多[4]
浙江省台州市八所重点中学2021-2022学年高二下学期期末联考数学试题(已下线)专题10 导数及其应用难点突破2-利用导数解决零点、交点问题-2(已下线)第四章 导数与函数的零点 专题二 定量问题 微点2 函数零点个数问题综合训练(已下线)重难点突破09 函数零点问题的综合应用(八大题型)
更新时间:2022-07-17 15:46:12
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解答题-问答题
|
困难
(0.15)
【推荐1】设函数
.
(1)若
,求函数
图象在
处的切线方程;
(2)若
在
处取得极小值,求
的单调区间;
(3)若
恰有三个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6fdad1cdc364ca0134e3b36a50a73e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(0.15)
名校
【推荐2】已知
,函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)若
在区间
上存在两个不同的极值点.
①求
的取值范围;
②若当
时恒有
成立,求实数
的取值范围.
(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6db0d30efef15a981ce239f3541b99a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2072fe5a3f23ac574dde4f0abb2fd5e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fce155963060b2e5b9147a185897cc.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6df167612a71a4d841ceaa652983129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9405361d7be3c9e4d462a4e955d8fe3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c0309456de2cd6420ece4fbc5eeddb.png)
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(0.15)
【推荐3】已知函数
,其中e是自然对数的底数.
(1)当
时,函数
的图象是否存在平行于x轴的切线,如果存在求出切线方程,如果不存在说明理由;
(2)当
时,若函数
在
恰有两个零点,求a的取值范围(参考:
,
;
,
.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c6114ff97a454606c3c06d9f9aa271.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f23a1cabfd92862e151d26a1270af0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad3a3ed2f0ce23b00fe252d1a6c058b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c6c9579333fc6960cc209519c79759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474a84b9005951d2efe7cd9a70d5e63e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c6c9579333fc6960cc209519c79759.png)
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|
困难
(0.15)
【推荐1】已知函数
,
.
(1)求函数
的单调区间;
(2)设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87676cc3ca413d9ba64fab2cd45c909c.png)
,已知函数
在
上是增函数.
(i)研究函数
在
上零点的个数;
(ii)求实数c的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30643703ac47b54d273f47cb0c1a585f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb67904d5c5907c0e3d81bda26ef258.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87676cc3ca413d9ba64fab2cd45c909c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2a64f3b3948f8a2422aa99fd3663d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2112b3a911f75cd9bf1b3ab3b74adef3.png)
(i)研究函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06b697f70853fdaf26aa0027724c1aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f68c6ed09e483db6edf0b4caf5e252.png)
(ii)求实数c的取值范围.
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(0.15)
名校
【推荐2】已知函数
的图象与
轴相切于原点.
(1)求
,
的值;
(2)若
在
上有唯一零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc0bbb9eda755d5e45ddc0c2c806167e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbfe8e7fb253685e0e50bae0c5482314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(0.15)
【推荐3】已知函数
.
(1)若对任意的
,不等
恒成立,求实数a的取值范围;
(2)讨论函数
零点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cd96de5449a1bd6c2b2dc1698754eef.png)
(1)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6074e41127276e888e5d9aa8ac767edf.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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