1 . 已知函数
.
(1)判断
的导函数在
上零点的个数,并说明理由;
(2)证明:当
时,
.
注:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aac7512e70d2bba71cef5558a3973f3.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4921923069c4f38a0af1ff8637e35b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c41df63267cd4a9e7dd9b6af0526ef.png)
注:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e2ae6e8274a3b0d2b3dd3eb211baa0.png)
您最近一年使用:0次
2023-05-09更新
|
559次组卷
|
3卷引用:贵州省部分高中2023届高三模拟考试数学(文)试题
2 . 定义函数
,其中
.
(1)当
时,求曲线
在点
处的切线方程;
(2)证明:在区间
上,
有且只有两个不同的极值点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26dfc40f7f470d3d7cff59fcdd7b5568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20611e8dc649c55a330103553a54f356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b212e0d4339cbd3d236a807547ebf6.png)
(2)证明:在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8c4008d33613ee4a86255f876722ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
您最近一年使用:0次
3 . 已知函数
在
处取得极小值
.
(1)求实数
的值;
(2)当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/687eec4bc7c461e5439659a5c4ff541d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347f27a9c4beb03c9cdd26271cb2a21.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d4018c4e91641f611df930251d00d2.png)
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2023-08-03更新
|
310次组卷
|
2卷引用:贵州省威宁彝族回族苗族自治县第八中学2023届高三数学(文)冲刺卷(二)试题
4 . 已知函数
.
(1)讨论
的单调性;
(2)若
,证明:对于任意
,
恒成立.(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c207efd83d75c1f69237d97616c726.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f184ef9e0d57554e95f369c9d4bbfea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c164755dc2d7cff80fb4c9cffc9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8ef34a025b672da960adc1d54adcd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b7e46d838bf6cf52979d5976d9c8f6.png)
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2023-01-19更新
|
264次组卷
|
2卷引用:贵州省黔东南州2023届高三上学期复习统一检测(期末)数学(文)试题
5 . 已知函数
.
(1)讨论函数的单调性及极值,并判断方程
的实根个数;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec4fac2691ded9b3187116e97d82e5b.png)
(1)讨论函数的单调性及极值,并判断方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc313952a96b3754600fa57d5f7d8fa7.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb7f286aeebbdc029989cc66250a10a.png)
您最近一年使用:0次
6 . 已知直线
与抛物线C:
交于A,B两点,分别过A,B两点作C的切线,两条切线的交点为D.
(1)证明点D在一条定直线上;
(2)过点D作y轴的平行线交C于点E,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088fcdd595455906a1a7080d630611f5.png)
(1)证明点D在一条定直线上;
(2)过点D作y轴的平行线交C于点E,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
您最近一年使用:0次
2023-04-25更新
|
345次组卷
|
3卷引用:贵州省凯里市第一中学2023届高三三模数学(理)试题
贵州省凯里市第一中学2023届高三三模数学(理)试题广东省汕头市潮阳一中明光学校2022-2023学年高二下学期期中数学试题(已下线)3.3.2 抛物线的简单几何性质(6大题型)精讲-【题型分类归纳】2023-2024学年高二数学同步讲与练(人教A版2019选择性必修第一册)
7 . 已知函数
在
(
为自然对数的底数)时取得极值,且有两个零点
,
.
(1)求实数
的值,以及实数
的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/975d2e7c564c1ec64d6fc5cee3bcf26b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187c21027ff08411931d32c530b64fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4900c67f4b57fa430c4bd863f8e896.png)
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解题方法
8 . 已知函数
.
(1)当
时,讨论
的单调性;
(2)证明:当
时,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8dbfed1efce91fbd59095d025b1184.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b06387179d53c1e474fcfcb408b1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87008291cdba83461d58dbc9426d777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9a01c0b3ce60a5d651bc8f5cdd557f.png)
您最近一年使用:0次
名校
解题方法
9 . 已知函数
.
(1)求函数
的单调区间;
(2)若对任意
,存在正实数
,
,使得
恒成立,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689ab1bbe61bd780027d808126c04a6a.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87a9ef1f87936695fb681df932efd10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafb9357b9a75d70f568a01f14d64aaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40610bc23e23caeadbf3420a7c2d790.png)
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2023-01-13更新
|
400次组卷
|
2卷引用:贵州省贵阳市第一中学2023届高三上学期12月月考数学(理)试题
10 . 已知函数
.
(1)当
时,求
的单调区间;
(2)若
,设
是
的两个极值点,求证;
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2160f53364f0baced3778e340d39149.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81acc03f559e796903ca0c5ccb9b452.png)
您最近一年使用:0次
2022-08-22更新
|
546次组卷
|
6卷引用:贵州省贵阳市2023届高三上学期8月摸底考试数学(理)试题
贵州省贵阳市2023届高三上学期8月摸底考试数学(理)试题贵州省黔南州2023届高三上学期摸底数学(理)试题河南省北大公学禹州国际学校2022-2023学年高三上学期第一次月考理科数学试题(已下线)专题08 导数及其应用(讲义)-2江苏省盐城市亭湖高级中学2022-2023学年高三上学期第一次摸底考试数学试题(已下线)河南省济源市、平顶山市、许昌市2022届高三文科数学试题变式题21-23