题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152631-26929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152631-89124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152631-61180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152631-15018.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152632-31706.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152632-33283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152632-58401.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152632-99903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-23429.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-75652.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-36969.png)
(3)直接写出
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
答案
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-44426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-60638.png)
(3)“设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-13147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-48768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-46911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-60638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152635-72935.png)
解析
试题分析:解 (1)直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152635-94924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152635-15140.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152635-30566.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152635-54421.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152636-83587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152636-30012.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152636-35469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152636-83078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152637-24794.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152637-24735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152637-38874.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152637-80359.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152637-63470.png)
所以当
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-44426.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-60638.png)
另解 设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152636-30012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152638-55803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152638-69483.png)
要使
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152638-24650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152638-60822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-44426.png)
(3)若考生给出“设
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-13147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-48768.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-46911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-60638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152635-72935.png)
若考生给出“当
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152639-91189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152633-37054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152634-60638.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152635-72935.png)
( 注:本小题分层评分)
点评:主要是考查了直线与椭圆的位置关系的运用,属于中档题。
核心考点
试题【如图,已知椭圆,是长轴的左、右端点,动点满足,联结,交椭圆于点. (1)当,时,设,求的值;(2)若为常数,探究满足的条件?并说明理由;(3)直接写出为常数的一】;主要考察你对椭圆的定义与方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152615-43401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152615-55055.png)
(1)求点T的横坐标
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152615-45337.png)
(2)若以F1,F2为焦点的椭圆C过点
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152615-90542.png)
①求椭圆C的标准方程;
②过点F2作直线l与椭圆C交于A,B两点,求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152615-86317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152558-56007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152558-87211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152558-76568.png)
(1)若椭圆的半焦距
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152558-39731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152558-15675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152558-38951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152558-42520.png)
求椭圆的方程;
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152559-28503.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152559-94027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152559-66505.png)
(3)在(2)的条件下,若椭圆的离心率
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152559-60530.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152559-89331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152543-12714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152543-38710.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152543-16101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-39827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-18052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152543-16101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-84461.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-84461.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-37713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152543-16101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-39827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-37713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152544-84461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152545-15921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152543-16101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152545-51841.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152533-71134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152534-33558.png)
(Ⅰ)求椭圆C的方程;
(Ⅱ)设直线l:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152534-22445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152534-88089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152534-42582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152528-94781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152528-79182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152529-61827.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152529-53049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023152529-39852.png)
A.![]() | B.![]() | C.![]() | D.![]() |
最新试题
- 1函数y=x+4x 的单调递增区间为______.
- 2如图所示,甲、乙两个用同种材料制成的均匀实心正方体放在水平地面上,可能使甲和乙对地面的压强相等的方法是( )A.沿水平
- 3读下图,完成以下几题:(1)把图1中字母代表的日本工业区名称填在下面:A_____________B__________
- 4将下面一则消息压缩为一句话新闻。(不超过24个字,3分)最近,在安徽枞阳县汤沟镇出了一桩新鲜事,全镇有九成农民在建造新房
- 5只有阳离子而没有阴离子的晶体是A.金属晶体B.原子晶体C.离子晶体D.分子晶体
- 6编辑一个运算程序:2*2006=1,(2n+2)*2006=3•[(2n)*2006],则2008*2006的输出结果为
- 7阅读理解。 Exhibition: Little Angels Date: January 10 - S
- 8人类进入21世纪以后,虽然和平与发展依然是当今世界的主题,但就某些国家和局部区域而言,仍面临着十分严峻的和平与安全的挑战
- 9The doctors did all they could _______ him _______.A.to brin
- 10We use human translators rather than machines as we believe
热门考点
- 1 —Laura enjoys story books? —Me, too.A. reading
- 2如图所示,用细线悬挂一个小球,在水平恒力F作用下小球能在B处静止,现用该恒力F将小球由静止从竖直位置A拉到位置B,此时线
- 3有三张卡片(背面完全相同)分别写有、、,把它们背面朝上洗匀后,小明从中抽取一张,记下这个数后放回洗匀,小白又从中抽出一张
- 4为应对金融危机,刺激消费,某市给市民发放旅游消费券,由抽样调查预计老、中、青三类市民持有这种消费券到某旅游景点的消费额及
- 5某通讯公司推出①、②两种通讯收费方式供用户选择,其中一种有月租费,另一种无月租费,且两种收费方式的通讯时间x(分钟)与收
- 6已知,则等于( )A.B.C.D.
- 7给下列加粗字注音。嗜学 逾约 俟其欣悦
- 8“吸引我的是它的绚丽,它来自一个新的天地,从未见过如此优美的艺术。多么诱人,精致脱俗,来自中华,它的故土(景德镇)。”这
- 9【朝】下列各选项中选出错误的一项是:A.于是入朝见威王。《邹忌讽齐王纳谏》(名词,朝廷)B.朝闻道,夕死可也。(名词,早
- 10如图四棱锥E—ABCD中,底面ABCD是平行四边形。∠ABC=45°,BE=BC= EA=EC=6,M为EC中点,平