1 . 已知抛物线
焦点为
,点A,B,C为该抛物线上不同的三点,且满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f99ea4eb616ac2a092b0e5805b717f1b.png)
(1)求;
(2)若直线交
轴于点
,求实数
的取值范围.
您最近一年使用:0次
2017-08-09更新
|
911次组卷
|
2卷引用:四川省资阳市2016-2017学年高二下学期期末考试数学(理)试题
名校
2 . 如图,在直角梯形中,
,
∥
,
,
,图中圆弧所在圆的圆心为点C,半径为
,且点P在图中阴影部分(包括边界)运动.若
,其中
,则
的最大值为
A.![]() | B.![]() |
C.2 | D.![]() |
您最近一年使用:0次
2017-04-09更新
|
1281次组卷
|
2卷引用:2017届四川省资阳市高三4月模拟考试数学(文)试卷
2014·四川成都·一模
名校
3 . 在平面直角坐标系xOy中,点P是圆
上一动点,
x轴于点D.记满足
的动点M的轨迹为Γ.
(1)求轨迹Γ的方程;
(2)已知直线
与轨迹Γ交于不同两点A,B,点G是线段AB中点,射线OG交轨迹Γ于点Q,且
.
①证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbd3c39efb7dabc1be5bf7131a55137.png)
②求△AOB的面积S(λ)的解析式,并计算S(λ)的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e458f4503e211b542f6f30c8a34eaca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5499dce6f03cbda807710f0df203f1d.png)
(1)求轨迹Γ的方程;
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde3c21138dd7a96b19eb742246f43d.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cbd3c39efb7dabc1be5bf7131a55137.png)
②求△AOB的面积S(λ)的解析式,并计算S(λ)的最大值.
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解题方法
4 . 如图,在平面直角坐标系
中,直线
,
与椭圆
:
分别交于
、
两点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/ef8781c9-bd41-4526-9f45-ef131544b260.png?resizew=214)
(1)证明:
为定值;
(2)点
满足
,直线
与椭圆交于点
,设
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f2dc8aae6e87fb0a670f6b5dc0e3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe6b9b2224bf87b756d29e4f618abb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41ddacf71cc3877265f41f47ae9097a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/ef8781c9-bd41-4526-9f45-ef131544b260.png?resizew=214)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd9b39f5e43f25956b64b656bf31d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4425fa0b9e3d353f9d7d40ab65a4920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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