已知椭圆
的左、右两个焦点分别为
,P是椭圆上位于第一象限内的点,
轴,垂足为Q,
,
,
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/c7ba090f-4692-4121-bb5f-894dd2b48f54.png?resizew=196)
(1)求椭圆F的方程:
(2)若M是椭圆上的动点,求
的最大值,并求出
取得最大值时M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebee672f609438c59efd324764b8843e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4428ec56246b35cb87bfe7ed50f0ad0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d77e813e1b90358ba06ba2a603706e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af2fdf1944afebb51cb6a5e6c74aadd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/c7ba090f-4692-4121-bb5f-894dd2b48f54.png?resizew=196)
(1)求椭圆F的方程:
(2)若M是椭圆上的动点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f077fb4f73c2123538e19365d84748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f077fb4f73c2123538e19365d84748.png)
17-18高二下·上海静安·期中 查看更多[3]
更新时间:2019-12-12 20:35:29
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适中
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【推荐1】在平面直角坐标系中,抛物线解析式为
,直线
与x轴交于点A,与y轴交于点B.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/d1282f95-95cc-4a5f-9ed0-70f6faf5be47.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/ec8ae844-dceb-4115-9da5-429ede8cec79.png?resizew=180)
(1)如图1,当抛物线经过点A且与x轴的两个交点都在y轴右侧时,求抛物线的解析式;
(2)在(1)的条件下,若点P为直线l上方的抛物线上一点,过点P作
于Q,求
的最大值;
(3)如图2,点
,若抛物线与线段AC只有一个公共点,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71475c169c8437854f224a188036f514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6533e1efcd09fa6f176874abc7b50d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/d1282f95-95cc-4a5f-9ed0-70f6faf5be47.png?resizew=180)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/ec8ae844-dceb-4115-9da5-429ede8cec79.png?resizew=180)
(1)如图1,当抛物线经过点A且与x轴的两个交点都在y轴右侧时,求抛物线的解析式;
(2)在(1)的条件下,若点P为直线l上方的抛物线上一点,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b9d83969b6a8e27e57ab71b34e2b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dd31773f55719ebd91ed3389d0de68.png)
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【推荐1】已知在
中,
分别是角
的对边,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298ce772868ca3b6f9260959c524a486.png)
(1)求角
;
(2)当边长
取得最小值时,求
的面积;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298ce772868ca3b6f9260959c524a486.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)当边长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图,梯形
中,
.
![](https://img.xkw.com/dksih/QBM/2018/7/26/1996931844202496/2002389960179712/STEM/af157fd2620d408eb1908da17ae190e0.png?resizew=119)
(1)若
,求
的长;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf331564e475cd01c450372689899a8.png)
![](https://img.xkw.com/dksih/QBM/2018/7/26/1996931844202496/2002389960179712/STEM/af157fd2620d408eb1908da17ae190e0.png?resizew=119)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1887bb8a6efb762f51070f07b67785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905c7dbd4a489c232f4c7ceb05479ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
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【推荐1】在△ABC中,内角A、B、C的对边分别为a、b、c,且
.
(1)求
的值;
(2)若cosB
,△ABC的面积为
,求△ABC的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dd8fda7378b38cf2119169dd56baf2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/697d5df9e5757d5457355eafb92102de.png)
(2)若cosB
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d06d924ecb4611c95c346342e62aa25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7974d314172eb725e842432330fa4.png)
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【推荐2】已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcff8fb041920da70a8fd75508f290a7.png)
,若
,且
的图像相邻的对称轴间的距离不小于
.
(1)求
的取值范围;
(2)在锐角
中,
,
,
分别是角
,
,
的对边,若当(1)中
取最大值时,
,且
的面积是
,求
周长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d40f699cc8482ba53f315ff8bfe767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcff8fb041920da70a8fd75508f290a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ddbb5cfaedab59c97125105c3fe590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/740710b92f3f3af8f447d1a12799ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(2)在锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3c28e2fc237e76e757b8a82c619802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】已知椭圆E:
经过点
,且离心率
.
(1)求椭圆E的方程;
(2)设椭圆E的右顶点为A,若直线
与椭圆E相交于M、N两点(异于A点),且满足
,试证明直线l经过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948261c41cc1509f023761d880c75582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de261e9b4defbc0be6440397031a87b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c7316976a221c051a2c14df80b1347.png)
(1)求椭圆E的方程;
(2)设椭圆E的右顶点为A,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3342ceb71dc21a5e6150caad2ce0b029.png)
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【推荐2】已知椭圆
上的点到它两个焦点的距离之和为4,以椭圆
的短轴为直径的圆
经过两个焦点,点
,
分别是椭圆
的左、右顶点.
(Ⅰ)求圆
和椭圆
的方程;
(Ⅱ)设
,
分别是椭圆
和圆
上的动点(
,
位于
轴两侧),且直线
与
轴平行,直线
,
分别与
轴交于点
,
,试判断
与
所在的直线是否互相垂直,若是,请证明你的结论;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6b94e42869013745050aba059b58dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅰ)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
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