1 . 已知
,
,
,则a,b,c的大小关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0041101d4eff5efc597fbac68a4ce35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7437045ff5767762fb0b29216d2f9744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e0184239402660e7dbfac7bffae610.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
2 . 在平面直角坐标系
中,已知抛物线C:
的焦点为F,准线为
,过点F且斜率大于0的直线交抛物线C于A,B两点(其中A在B的上方),过线段
的中点M且与x轴平行的直线依次交直线
,
,
于点P,Q,N.给出下列四个命题:
①
;
②若P,Q是线段
的三等分点,则直线
的斜率为
;
③若P,Q不是线段
的三等分点,则一定有
;
④若P,Q不是线段
的三等分点,则一定有
;
其中正确的是________ (写出所有正确命题的编号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e0eb0427d9ce590ab728d577a6a300.png)
②若P,Q是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
③若P,Q不是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317da7094380eaf6744bad14ac7df98e.png)
④若P,Q不是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1733edb422cd54d80475470ca7f0049.png)
其中正确的是
您最近一年使用:0次
2023-12-09更新
|
264次组卷
|
4卷引用:四川省成都市石室中学2022届高三上学期期末数学(理)试题
名校
解题方法
3 . 已知椭圆C:
的离心率为
,两焦点与短轴两顶点围成的四边形的面积为
.
(1)求椭圆C的标准方程;
(2)我们称圆心在椭圆C上运动,半径为
的圆是椭圆C的“卫星圆”,过原点O作椭圆C的“卫星圆”的两条切线,分别交椭圆C于A,B两点,若直线OA,OB的斜率存在,记为
,
.
①求证:
为定值;
②试问
是否为定值?若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
(1)求椭圆C的标准方程;
(2)我们称圆心在椭圆C上运动,半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576833b76e9cad3b523f87132308df99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
②试问
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a0d9a2f14f7e789892487d6585804a.png)
您最近一年使用:0次
2023-08-05更新
|
526次组卷
|
4卷引用:四川省成都市第四十九中学校2021-2022学年高三上学期12月月考理科数学试题
名校
4 . 已知
,则下列说法中正确的有( )
①若
存在三个相异零点
、
、
和两个极值点
、
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb6b5f722c6afa2bca6e64d45c18d57.png)
②若
存在三个正零点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409569a77c58b07a27f428a06106f1a7.png)
③过曲线
上一点
作曲线
的切线再交曲线
于点
,同理得点
,则
为定值
④若曲线
存在唯一的内接正方形,则其面积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229ff7b4fccd7cc3ec3bc292990422e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd8f4ae110f816cc9b6c9f191486b52.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.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/6fb6b5f722c6afa2bca6e64d45c18d57.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409569a77c58b07a27f428a06106f1a7.png)
③过曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919a65c894b009dce7484950646a8332.png)
④若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229ff7b4fccd7cc3ec3bc292990422e5.png)
A.0个 | B.1个 | C.2个 | D.3个 |
您最近一年使用:0次
5 . 在直角坐标系
中,点
,直线
.设动点
到
的距离为
,且
.以点
为极点,
轴正半轴(
点右侧)为极轴,建立极坐标系.
(1)求
轨迹
的极坐标方程;
(2)直线
为参数),与
交于
、
两点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2977eea43a781e06d93e04a395a309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0667fd53392abfa58d360e78814eaf51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33a784ffdf8c129f217c4e572df097a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
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解题方法
6 . 如图,在
与
中,
,
,
,
.连接
与
交于
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b53126f40bebbf484007b96d8b6cbe8.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36572a10fcb483a9abb63a5039e09ec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bfb235f77128813c9daaaf5cc0e705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef416f5253e7b253d8ee2728076120e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5de41efce6408ef107de0bfbe4bf08b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b53126f40bebbf484007b96d8b6cbe8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/002eaeba-c0ce-4b12-93a3-e6c463d17b4c.png?resizew=171)
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解题方法
7 . 已知
,
,
,其中e是自然对数的底数,
.
(1)讨论当a=1时,函数
的单调性和极值;
(2)求证:在(1)的条件下
;
(3)是否存在正实数a,使
的最小值是3?若存在,求出a的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0ff7ac083b888d0055e49bf130a6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3980c52927f12c114f3b291ad714d778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc6deca979f50c3310464cca848768a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f7f23e7f20dd8bc65a4967cd306782.png)
(1)讨论当a=1时,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求证:在(1)的条件下
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbf67014ab217c6cacd76dc4b19774d8.png)
(3)是否存在正实数a,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解题方法
8 . 已知函数
.
(1)若对任意的
,不等式
恒成立,求实数
的取值范围.
(2)设
,点
为曲线
上的两个不同点,若
,且存在
,使得曲线
在点
处的切线与直线
平行,试证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e90b38227032e3894364e1b16e6fb2.png)
(1)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c164755dc2d7cff80fb4c9cffc9be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447d6f62c09c1d05346fd16a24159f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031da5d48fbe63745429b1add253344f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127c87b21e41f18b1ba4b5a4a9b66668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292ad2975d55f557e420aeb5d7a01d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8152c0ec3385924337832fad816f460c.png)
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9 . 如图,圆C:
与圆O:
内切于点A,当圆C沿圆O逆时针方向无滑动地滚动一周时,圆C上的定点P(开始在点A)运动的轨迹是一个三叶轮.已知圆C上的定点P按这种运动方式从点A开始运动(B是两圆的切点).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/fddcfe0b-943a-40b1-a8ab-159fe401e6ab.png?resizew=170)
(1)若
,求点P的坐标;
(2)若
,求点P的轨迹关于
的参数方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9df0d79e42d86b0def4caa10dffa75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/fddcfe0b-943a-40b1-a8ab-159fe401e6ab.png?resizew=170)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d162c29b1e484cfc87350dd68f00b85.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7e00f8bacce4d649b535449f04568c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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解题方法
10 . 已知函数
有且仅有一条切线经过点
.若
,
恒成立,则实数
的最大值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b692aadba7fb99ddfa605a20a167ad00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c84e7b41a841a230ed5f8a42309aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ccb692a97ea01b9847bb3401f8a6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda7eaabd9a965818c89bc853c14cbbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2023-03-01更新
|
489次组卷
|
5卷引用:四川省成都市锦江区四川师范大学附属中学2020-2021学年高二下学期期中考试理科数学试题