名校
1 . 若对于任意一组实数
都有唯一一个实数
与之对应,我们把
称为变量
的函数,即
,其中
均为自变量,为了与所学过的函数加以区别,称该类函数为二元函数,现给出二元函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aded986b3674593739b22d4843c40af.png)
,则此函数的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9c5c7cffee04e1a5545ea43e6f0f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1326a39cbb9a2cbb148ea33e5aa66462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aded986b3674593739b22d4843c40af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/634bc4f898896f2adff0a53dddc1cd1e.png)
您最近一年使用:0次
2 . 已知动圆
与圆
外切,与圆
内切.
(1)试求动圆圆心
的轨迹方程;
(2)过定点
且斜率为
的直线
与(1)中轨迹交于不同的两点
,试判断在
轴上是否存在点
,使得以
为邻边的平行四边形为菱形?若存在,求出实数
的范围;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce807a9076837a8069e0a66a8c7fadf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5a25f4d596ac89bd9048511f443d9.png)
(1)试求动圆圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a2c50147561e03ed046ee8c8374071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff698edaadb3a318d463ce11d53dc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fde1b6be6d4eeb58076e7218fa1a46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d42cb68c5c877a455ba7ac0a6b6a651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2017-05-03更新
|
1221次组卷
|
2卷引用:【全国百强校】河南省郑州市第一中学2018届高三12月月考数学(理)试题
3 . 设圆
的圆心在
轴上,并且过
两点.
(1)求圆
的方程;
(2)设直线
与圆
交于
两点,那么以
为直径的圆能否经过原点,若能,请求出直线
的方程;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e186a406d863819fcf284f2eb64f2eb.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b74381f68eb1e33d412a7a3d62313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2017-04-11更新
|
1892次组卷
|
5卷引用:2016-2017学年河南省平顶山市高一上学期期末调研考试数学试卷
4 . 已知圆
与圆
:
关于直线
对称,且点
在圆
上.
(1)判断圆
与圆
的公切线的条数;
(2)设
为圆
上任意一点,
,
,
三点不共线,
为
的平分线,且交
于
,求证:
与
的面积之比为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fc13fdc9f742d44cbd38efbabe3651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1149a5c153c4e050334d1d8ea113c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)判断圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35af8a223d55ef90910a778c932ea1a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9ce9420cd614b74030d2f73629f7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01225eca2322a6136314dedadcafa994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31008fac873239d48fc0989bf2961704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fdb049f8af3eede385ec04a07c5f63.png)
您最近一年使用:0次
2017-03-12更新
|
1369次组卷
|
3卷引用:河南省林州市第一中学2016-2017学年高一下学期期中考试数学试题