1 . 在平面直角坐标系中,
,
,
,
四点在同一个圆
上.
Ⅰ
求实数
的值;
Ⅱ
若点
在圆
上,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9c730266ecf448c14608e24d37b986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02af485e17e7628fd5a3ace6e0a32ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7089a4e568ed92b1230af589f4d47be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292b20ba1bc04a5b8135c1f10d1370c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7819acf4f35610aa238a5855ceacdabb.png)
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2020-01-30更新
|
196次组卷
|
2卷引用:浙江省绍兴市2019-2020学年高二上学期期末数学试题
名校
2 . 已知圆M的方程为x2+y2-2x-2y-6=0,以坐标原点O为圆心的圆O与圆M相切.
(1)求圆O的方程;
(2)圆O与x轴交于E,F两点,圆O内的动点D使得DE,DO,DF成等比数列,求
•
的取值范围.
(1)求圆O的方程;
(2)圆O与x轴交于E,F两点,圆O内的动点D使得DE,DO,DF成等比数列,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718c1e791eb6f0e14c58fd5ba26c8635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22fb37787536bec9699d46afe391ba57.png)
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2019-12-16更新
|
247次组卷
|
3卷引用:江苏省南通市启东中学2019-2020学年高二上学期第二次质检数学试题
名校
3 . 下列选项中说法正确的有( )
A.“若点![]() ![]() ![]() ![]() |
B.已知直线![]() ![]() ![]() ![]() |
C.已知直线![]() ![]() ![]() ![]() |
D.过直线![]() ![]() ![]() ![]() |
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4 . 在平面立角坐标系
中,两圆
,
均过点
,它们的圆心分别为
,
,满足
,若两圆与
轴正半轴分别交于
,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9df2062940530232ab124a571e951ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb652143b43cc9439a347b2b1dc5cf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c419a0ce733c29eec7a59959a2ccc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e145c38677723f06f974774ea279d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179f5926c0289862d9b2d932bcb7154e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85af6eaff9a4e3e9af4e9c1f4f7b996.png)
A.2 | B.6 | C.9 | D.与![]() ![]() |
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名校
解题方法
5 . 我们把形如
的函数因其图像类似汉字“囧”字,故生动地称为“囧函数”,并把其与
轴的交点关于原点的对称点称为“囧点”,以“囧点” 为圆心凡是与“囧函数”有公共点的圆,皆称为“囧圆”,则当
时,所有的“囧圆”中面积的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2d5ce8993f30427c50dea399f7ff28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76fa77d1b0bc4c1af9c8c41bf0dabe2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知抛物线
的准线方程是是:
.
(1)求抛物线方程;
(2)设直线
与抛物线相交于
两点,
为坐标原点,证明以
为直径的圆过
点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21be4ca5919e23d17c902a3b09b0f0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
(1)求抛物线方程;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d50586ff0822c7d00945bc38d67c40a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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7 . 在平面直角坐标系
中,两动圆
均过定点
,它们的圆心分别为
,且与
轴正半轴分别交于点
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4104553c2e9e55c87dacb8ad1920377b.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d096cd7bd8a5a2219fd7dd166bbb8460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d106dad7afeb8c01b16b75fbc33d5885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df106725f307dea1c7090fceed80c4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb5260e00934c2c0f24ecc4291bb8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4104553c2e9e55c87dacb8ad1920377b.png)
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8 . ①两条直线没有公共点是两条直线异面的必要不充分条件;
②若过点
作圆
的切线有两条,则
;
③若
,则
;
④若函数
在
上存在单调递增区间,则
;
以上结论正确的个数为( )
②若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66750b04618d38603e7f6661d608d9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffd13d3604b25e46c361363501634c1.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db4ed3784514dec0b023085c4e8d1da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9296dfb9fddb4616c7ca6c3d0fcfd3.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a1d7c20e47a1b97a392d80dd2ae437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b603463669f21425b4940bf66c10bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40039fcd08fbe93f8d8a15427d26ed15.png)
以上结论正确的个数为( )
A.1 | B.2 | C.3 | D.4 |
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解题方法
9 . 若不论
为何值,直线
与曲线
总有公共点,则
的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4baf0ab6d60b8509dba1aee2a985b363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2017-10-31更新
|
816次组卷
|
2卷引用:北京市东城区171中学2016-2017高二上学期期中考试数学(文)试题
名校
10 . 已知
,
,
、
的夹角是60°,若向量
满足
,则
的最小值为________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7143c24a0f6abee7f14a3f1a8ddbb467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfc0de16bdd7237d6e171e35b4366f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9fe13b1fe5ce4256ae232395e4d8026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bae51bb46847e0653b83ab564ac4533.png)
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