1 . 已知点A(﹣2,1),y2=﹣4x的焦点是F,P是y2=﹣4x上的点,为使|PA|+|PF|取得最小值,则P点的坐标是
A.(![]() | B.(﹣2,![]() |
C.(![]() | D.(﹣2,![]() |
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2 . 若k
R,则“
”是方程
”表示双曲线的_____ 条件(填“充分不必要”,“必要不充分”,“充要”,“既不充分也不必要”)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc329b32ecf0f0532d09a8a21343e8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3776c5f3fab373ec393f4ea2009cfcf8.png)
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3 . 过双曲线
﹣
=1(a>0,b>0)的左焦点F1,作圆x2+y2=a2的切线交双曲线右支于点P,切点为T,PF1的中点M在第一象限,则以下结论正确的是
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527516459008/1572527521570816/STEM/eaba108331ed44068681026b242f6f9c.png)
![](https://img.xkw.com/dksih/QBM/2016/3/9/1572527516459008/1572527521570816/STEM/765bcbaecbbb4237859375e1c9d8569b.png)
A.b﹣a=|MO|﹣|MT| |
B.b﹣a>|MO|﹣|MT| |
C.b﹣a<|MO|﹣|MT| |
D.b﹣a=|MO|+|MT| |
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4 . 抛物线y=4x2的焦点坐标为
A.(1,0) | B.![]() | C.(0,1) | D.![]() |
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解题方法
5 . 直线
交抛物线
于A、B两点,O为抛物线顶点,OA⊥OB,则b的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafae84e7fe39dc5b694c39405201d32.png)
A.![]() | B.0 | C.1 | D.2 |
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2016-12-04更新
|
282次组卷
|
2卷引用:2015-2016学年山东济南一中高二上学期期末文科数学试卷
名校
6 . 已知点
,
的焦点是F,P是
上的点,为使|PA|+|PF|取得最小值,P点的坐标是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1294434b22cb5133043a2270ae1c43f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49187af2983d368cb409bda140984101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49187af2983d368cb409bda140984101.png)
您最近一年使用:0次
2016-12-04更新
|
536次组卷
|
2卷引用:2015-2016学年山东济南一中高二上学期期末文科数学试卷
7 . 双曲线的两个顶点三等分焦距,则双曲线的离心率为
A.4 | B.3 | C.2 | D.1 |
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8 . 椭圆
的两个焦点为
、
,弦
经过
,则
的周长为
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513750786048/1572513756782592/STEM/17eaf41b116f45359e7404ccdf6bf68a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5636341f2321bde31f5204d3482975a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 椭圆
的离心率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46ab26e2d950296e9edb81bb20bdcff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 已知椭圆
的中心在坐标原点,焦点在
轴上,它的一个顶点
的坐标为
,离心率为
.直线
与椭圆
交于
两点.
(Ⅰ)求椭圆
的标准方程;
(Ⅱ)若椭圆
的右焦点
恰好为
的垂心,求直线
的方程.
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c22009ec9ec3c22c838546f4f87008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c86f195b48b0eec67bb3fbc559ed2c.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0acae56742fbfd5705699e107d932749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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