1 . 曲线的曲率定义如下:若
是
的导函数,令
,则曲线
在点
处的曲率
.已知函数
,
,且
在点
处的曲率
.
(1)求
的值,并证明:当
时,
;
(2)若
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0268c3aeac7836cf0d453efc67f3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7522a3f232bd0b7a7850ae674db43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ae838c10d4fc8c474d7873dc8cfd07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72cd624f7e5bfe6549f3e62f0432a17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d4aa0ab41b5773fd67600fe2de77d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b301df975f8b3b3ba0cab5c4f8f12028.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a9e96e2ed7d9cd25c06f9a51a7210a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de6e9b440a15088e5f450cd4438ae72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c3fdcd52eebd86207b01a571c845f6.png)
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2021-05-02更新
|
788次组卷
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4卷引用:湖南省永州市2021届高三下学期三模数学试题
湖南省永州市2021届高三下学期三模数学试题(已下线)专题3.13 不等式的证明问题-2021年高考数学解答题挑战满分专项训练(新高考地区专用)(已下线)第五篇 向量与几何 专题21 曲率与曲率圆 微点1 曲率与曲率圆(一)山西省晋城市第一中学校2024届高三上学期11月期中数学试题
名校
解题方法
2 . 已知函数
(
,
为自然对数的底数),
是
的导数.
(1)当
时,求证:
;
(2)是否存在整数
,使得
对一切
恒成立?若存在,求出
的最大值,并证明你的结论;若不存在,也请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc62bb186214f638ae7eb5600a90b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
(2)是否存在整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91b7c3887ad1e4cc1d71a6c04645806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-03-22更新
|
427次组卷
|
4卷引用:2020届福建省福州第一中学高三下学期教学反馈检测数学(理)试题
2020届福建省福州第一中学高三下学期教学反馈检测数学(理)试题(已下线)2020届高三3月第01期(考点03)(理科)-《新题速递·数学》福建省福鼎第一中学2021-2022学年高二下学期第一次月考数学试题安徽省芜湖市第一中学2020届高三下学期3月第五次线上考试数学试题
名校
3 . 已知函数
,其中a为非零常数.
讨论
的极值点个数,并说明理由;
若
,
证明:
在区间
内有且仅有1个零点;
设
为
的极值点,
为
的零点且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a529375ea314a0e4f552a1f124864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e63138f920c05c2c0e4d1567c77e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372470aee75717ec33c53c3434eb126d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2dfaa0e63b9c720093ab80e2ed24c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18eca8193d91e13a240dec14be339cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbf1211335bcbc0ebb05414669eda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040135d64192de075ba0cc9f11ddbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8325e253d8c7d9f93de39db5c4b20a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d095d38de6613fa452d0a46b6f00b7f.png)
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2020-01-30更新
|
1028次组卷
|
7卷引用:2020届湖北省黄冈市高三上学期期末数学(理)试题
2020届湖北省黄冈市高三上学期期末数学(理)试题2020届广东省广州市执信中学高三2月月考数学(理)试题(已下线)必刷卷10-2020年高考数学必刷试卷(新高考)【学科网名师堂】-《2020年新高考政策解读与配套资源》2020届河南省平顶山市第一中学高三下学期开学检测(线上)文数试题(已下线)卷10-2020年高考数学冲刺逆袭必备卷(山东、海南专用)【学科网名师堂】2020届湖北省第五届高考测评活动高三元月调考理科数学试题安徽师范大学附属中学2019-2020学年高三下学期2月第一次月考理科数学试题
2023高三·全国·专题练习
4 . 已知函数
,
.
(1)讨论
的单调区间;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a3c53e08545a3fb2094d5acb9bf759c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbf385012a357665896ed5f46364391.png)
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5 . 已知函数
,若函数
的图象在
处的切线平行于
轴,且
、
是函数
的图象上任意两个不同的点,设直线
的斜率为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74da4b06c434c46d5a8958ad77f2592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad9a4881ebe1a4a566d0fab96d71baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b4fb8ee19381308693c1bd9757bed6.png)
您最近一年使用:0次
6 . 已知双曲线
,点A,B在双曲线右支上,O为坐标原点.
(1)若过点A作双曲线的两条渐近线的平行线,分别交两条渐近线于点M,N,证明:平行四边形
的面积为定值;
(2)若
,D为垂足,求点D的轨迹的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c477e5ade921ffa8377c4719319380ff.png)
(1)若过点A作双曲线的两条渐近线的平行线,分别交两条渐近线于点M,N,证明:平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2cf7996e3462e9791940885d3a5563.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd436ca3680ce9f9cba4b052ccdd9c7.png)
您最近一年使用:0次
2023-02-27更新
|
516次组卷
|
3卷引用:浙江省台州市2022-2023学年高二上学期2月期末数学试题
7 . 已知
,函数
,
.
(1)求函数
的单调区间和极值;
(2)设
较小的零点为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7024cf60d3372f97899a7087cec0e87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c11a11eae6199342d2d0fc671c43e70.png)
您最近一年使用:0次
2023-02-15更新
|
1551次组卷
|
3卷引用:模块十三 函数与导数-2
8 . 已知双曲线
的左焦点坐标为
,直线
与双曲线
交于
两点,线段
中点为
.
(1)求双曲线
的方程;
(2)经过点
与
轴不重合的直线
与双曲线
交于两个不同点
,点
,直线
与双曲线
分别交于另一点
.
①若直线
与直线
的斜率都存在,并分别设为
.是否存在实常数
,使得
?若存在,求出
的值;若不存在,请说明理由.
②证明:直线
恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5210e562b5a82e12c76d48910a656224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b818c643aa48668eabc47a79e8eca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec2ddb5af2259e125872e0b0e32ee8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f78464fbd81cdda9febcefb5252566a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b09e2d46f94b9ca3caf3f8283619c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c4a70b6a022a1edb45482d8335ce68.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67300207553ae70b997bde84ca730cf8.png)
(2)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6fdb50dcd92eae8b7e19e5a52147b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ffb694021b52653de5141ae27ba6d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f78464fbd81cdda9febcefb5252566a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4e4c7a79d9d3cdb9ac5949d53e33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2896fdcb5b81aee8ca7b49ffce40626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ddab1ca2e7187211d0d2bdfbfb54aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67300207553ae70b997bde84ca730cf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422cbf74078aaee2e59fce1cbe25be27.png)
①若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a159de0b2d9eb1ae0b7e664e64d3c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80861c13bb2d470a2953bebc5e3ea044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9faeed172ec5b88966b0d1c52748d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3360ca70819ab78d02e1cfa01d51d56c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9faeed172ec5b88966b0d1c52748d41.png)
②证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2022-10-18更新
|
1357次组卷
|
6卷引用:重庆市第一中学校2022-2023学年高二上学期10月月考数学试题
重庆市第一中学校2022-2023学年高二上学期10月月考数学试题(已下线)第04讲 圆锥曲线综合(练)重庆市南开中学校2022-2023学年高二上学期11月月考数学试题(已下线)专题9-5 圆锥曲线大题基础:定点归类(已下线)专题08 椭圆双曲线综合大题(9题型)-【巅峰课堂】2023-2024学年高二数学上学期期中期末复习讲练测(人教A版2019选择性必修第一册)(已下线)专题7-4圆锥曲线五个方程型大题归类-1
9 . 已知
是双曲线
上关于原点对称的两个点,点
在双曲线上.当
、
斜率存在时,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422935d85056bc2fa6d4d50d034f62eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c4ff18d767f0448c20cc674c8740e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc157c66eef6affd86e48432176c4240.png)
![](https://img.xkw.com/dksih/QBM/2022/7/19/3026156868280320/3026627908214784/STEM/c7464661924e46b0b3fa50e737799e4a.png?resizew=126)
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