解题方法
1 . 已知向量
满足
,
,
,
.则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/612afa7b97b18b8194457ae225293153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417a0aeb831a1530594b41dcc1829df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a600402d668cfc808ecb2cbd990f9f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc11e7549cfce9220e70250ac943e457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37dd0802f896556180545ae356e90c7a.png)
A.若点P在直线AB上运动,当![]() ![]() ![]() |
B.若点P在直线AB上运动, ![]() ![]() ![]() |
C.若点P在以r = ![]() ![]() ![]() |
D.若点P在以r = ![]() ![]() ![]() |
您最近一年使用:0次
名校
2 . 下列五个命题:①直线
的斜率
,则直线
的倾斜角的范围是
;②直线
:
与过
,
两点的线段相交,则
或
;③如果实数
,
满足方程
,那么
的最大值为
;④直线
与椭圆
恒有公共点,则
的取值范围是
;⑤方程
表示圆的充要条件是
或
;正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2157c1d1295e762906ef99295ade2b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e92b870d09ca5fefc684cf38c719314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8796f6d3e7a0e3771f83df47e99a970d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30ca15af0d5cbd9c45b2453a733810b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee751687aa1765a8ddfa07afa62c0e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255b750ea152997d71789b6c4fe97b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bcf46f1bb0d01620c1cbe79beece42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916bb2cc1b29574ff95b47567c59ee0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e030e40306ef61056e68956d0fbcef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d191d6de821fbb06a51b5a20112db6de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a52f8e6287412bdad953624e54da68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4069fbdedefbeffaf4bb806c91d348a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
A.②③ | B.③④ | C.②⑤ | D.②③⑤ |
您最近一年使用:0次
3 . 已知圆方程:
.
(Ⅰ)求
的范围;
(Ⅱ)求圆心到直线
的距离的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377884f9aeebf547cadbb2846d4ddd92.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)求圆心到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3035532a9da096af02dc969d82271d5c.png)
您最近一年使用:0次