解题方法
1 . 如图,P是直线
上一动点,以P为圆心的圆Γ经定点B(1,0),直线l是圆Γ在点B处的切线,过
作圆Γ的两条切线分别与l交于E,F两点.
(1) 求证:
为定值
(2)设直线l交直线
于点Q,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0038fefa3631a3b3064033ae6606366b.png)
![](https://img.xkw.com/dksih/QBM/2017/8/8/1747568471793664/1747951295881216/STEM/e791b8c1073148c7978576ae0766b6e5.png?resizew=227)
(1) 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2843730ec1403be97a27545eca962fe6.png)
(2)设直线l交直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e49a7a701fbc3274234126cd30b127.png)
您最近一年使用:0次
2017-08-08更新
|
1160次组卷
|
2卷引用:浙江省杭州市2016-2017学年高二下学期期末教学质量检测数学试题
2 . 已知椭圆C的两个顶点分别为A(−2,0),B(2,0),焦点在x轴上,离心率为
.
(Ⅰ)求椭圆C的方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(Ⅰ)求椭圆C的方程;
(Ⅱ)点D为x轴上一点,过D作x轴的垂线交椭圆C于不同的两点M,N,过D作AM的垂线交BN于点E.求证:△BDE与△BDN的面积之比为4:5.
您最近一年使用:0次
2017-08-07更新
|
10351次组卷
|
23卷引用:2017年全国普通高等学校招生统一考试文科数学(北京卷精编版)
2017年全国普通高等学校招生统一考试文科数学(北京卷精编版)湖北省孝感市七校教学联盟2016-2017学年高二下学期期末考试数学(理)试题2018秋高中数学人教A版选修1-1第二章:圆锥曲线与方程 评估验收(二)【全国百强校】宁夏石嘴山市第三中学2018-2019学年高二上学期期中考试数学(文)试题步步高高二数学暑假作业:【理】作业15 曲线与方程、椭圆步步高高二数学暑假作业:【文】作业15 椭 圆安徽省铜陵市枞阳县浮山中学2019-2020学年高二上学期期中数学(理)试题(已下线)专题9.9 圆锥曲线的综合问题(练)【理】-《2020年高考一轮复习讲练测》(已下线)专题9.5 椭圆(练)【理】-《2020年高考一轮复习讲练测》山西省太原市小店区山西大学附属中学校2019-2020学年高二上学期12月月考数学(理)试题(已下线)专题18 解析几何综合-五年(2016-2020)高考数学(文)真题分项(已下线)测试卷20 椭圆(B)-2021届高考数学一轮复习(文理通用)单元过关测试卷(已下线)测试卷19 椭圆(A)-2021届高考数学一轮复习(文理通用)单元过关测试卷山西省山西大学附中2019-2020学年高二(12月份)第四次诊断数学(理科)试题(已下线)检测(六)-【专题突破】2021-2022学年高二数学之圆锥曲线与方程(人教A版选修1-1)(已下线)专题11 圆锥曲线-五年(2017-2021)高考数学真题分项(新高考地区专用)(已下线)专题22 圆锥曲线中的定点、定值、定直线问题 微点2 圆锥曲线中的定值问题甘肃省兰州市外国语高级中学2022-2023学年高三上学期第二次月考文科数学试题(已下线)北京十年真题专题08平面解析几何北京十年真题专题08平面解析几何北京市第二外国语学院附属中学2022-2023学年高二上学期期中考试数学试题(已下线)专题24 解析几何解答题(文科)-3专题12平面解析几何(第二部分)
12-13高二上·广东深圳·期末
解题方法
3 . 已知直线
经过椭圆
的左顶点
和上顶点
,椭圆
的右顶点为
,点
为椭圆
上位于
轴上方的动点,直线
与直线
分别交于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/f606cbb9-a6f6-454c-9883-d271e7cf5f06.png?resizew=291)
(1)求椭圆
的方程;
(2)求证:直线
与
的斜率的乘积为定值;
(3)求线段
的长度的最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18feaed4f3dd7698210ba302c81dca6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](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/11b141148d19998c842aee2e5b1de63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c86c60c1e2c03439a55ddfc9bd2a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/f606cbb9-a6f6-454c-9883-d271e7cf5f06.png?resizew=291)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77e9c89b7275b0c1a9af5c9a72e5968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b5e290c6b2c5508a3bf6117afbf7e1.png)
(3)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2018-11-11更新
|
638次组卷
|
3卷引用:2011-2012学年广东省深圳高级中学高二上学期期末考试理科数学试卷
(已下线)2011-2012学年广东省深圳高级中学高二上学期期末考试理科数学试卷【校级联考】江苏省七校联盟2018-2019学年高二上学期期中联考数学试题北京市首都师范大学第二附属中学2021届高三下学期开学考试数学试题
4 . 设点O为坐标原点,椭圆
的右顶点为A,上顶点为B,过点O且斜率为
的直线与直线AB相交M,且
.
(Ⅰ)求证:a=2b;
(Ⅱ)PQ是圆C:(x-2)2+(y-1)2=5的一条直径,若椭圆E经过P,Q两点,求椭圆E的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60524e9071fff385a58387410cd53324.png)
(Ⅰ)求证:a=2b;
(Ⅱ)PQ是圆C:(x-2)2+(y-1)2=5的一条直径,若椭圆E经过P,Q两点,求椭圆E的方程.
您最近一年使用:0次
名校
5 . 已知:点
是离心率为
的椭圆
:
上的一点.斜率为
的直线BD交椭圆C于B、D两点,且A、B、D三点不重合.
(Ⅰ)求椭圆C的方程;
(Ⅱ)△ABD的面积是否存在最大值?若存在,求出这个最大值;若不存在,请说明理由?
(Ⅲ)求证:直线AB、AD的斜率之和为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58aab742dcee01ea15f2a74fbee0c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb223b8777ab973970491bf0dcc6806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(Ⅰ)求椭圆C的方程;
(Ⅱ)△ABD的面积是否存在最大值?若存在,求出这个最大值;若不存在,请说明理由?
(Ⅲ)求证:直线AB、AD的斜率之和为定值.
您最近一年使用:0次
2017-07-01更新
|
900次组卷
|
3卷引用:江苏省苏州市第五中学2016-2017学年高二12月月考数学试题
解题方法
6 . 在平面直角坐标系
中,有两定点
,
和两动点
,且
,直线
与直线
交于点
,点
的轨迹为曲线
.
(1)求曲线
的方程;
(2)若
为曲线
上的两点,且直线
过原点,
为曲线
上另一点,满足
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6b20064d29b41c13c756f2877cbf3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73552080b72be89317eb60e9bef76c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1ce8004f999548ef6146f10ea0e08a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e679a47b62837193f7e4ad2d81948787.png)
您最近一年使用:0次
名校
7 . 如图,已知椭圆
的右焦点为
,点
分别是椭圆
的上、下顶点,点
是直线
上的一个动点(与
轴的交点除外),直线
交椭圆于另一个点
.
![](https://img.xkw.com/dksih/QBM/2017/9/9/1770202951950336/1771096813338624/STEM/d8c2299ca26f49d38d40b65088c4bf17.png?resizew=179)
(1)当直线
经过椭圆的右焦点
时,求
的面积;
(2)①记直线
的斜率分别为
,求证:
为定值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e844b09ec0d37b2d5ea6c2f9dd42b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.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/9fec96b5e74f5c2915a1d34d0fdeb737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2017/9/9/1770202951950336/1771096813338624/STEM/d8c2299ca26f49d38d40b65088c4bf17.png?resizew=179)
(1)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73eff31eb9d55f95019a62f44ed71ad1.png)
(2)①记直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675efbcab4bc3d3d317cc093357c04c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
②求的取值范围.
您最近一年使用:0次
2017-09-10更新
|
537次组卷
|
5卷引用:2016届江苏省苏州市高三第一次模拟考试数学试卷
名校
8 . 已知椭圆
的长轴长为
,且椭圆
与圆
的公共弦长为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求椭圆
的方程.
(2)经过原点作直线
(不与坐标轴重合)交椭圆于
两点,
轴于点
,点
在椭圆
上,且
,求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8f118b80d18d1354c0b46e6670b149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)经过原点作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d3a0273d1f3046dfad2086d0df56c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343d939bd53fb751385c00ef3efe0142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2fb188915d2e3d7bfd633fa18221b07.png)
您最近一年使用:0次
2017-06-09更新
|
1478次组卷
|
4卷引用:安徽省巢湖市柘皋中学2017届高三最后一次模拟考试数学(文)试题
9 . 在平面直角坐标系
中,已知动点
到定点
的距离与到定直线
的距离之比为
.
(1)求动点
的轨迹
的方程;
(2)已知
为定直线
上一点.
①过点
作
的垂线交轨迹
于点
(
不在
轴上),求证:直线
与
的斜率之积是定值;
②若点
的坐标为
,过点
作动直线
交轨迹
于不同两点
,线段
上的点
满足
,求证:点
恒在一条定直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055a2ef09e2ee0948cf67c58de58732d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
①过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/245ad1e79cc6973ab7262f9f0538c71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/d95ccc811dff1bc10c961bfc6ffc70c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0cb4b2e0a7af501779001e4f6bb6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dd083a474de9b4bce5589f71619f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
您最近一年使用:0次
解题方法
10 . 如图,在平面直角坐标系
中,已知椭圆
过点
,
分别为椭圆
的右、下顶点,且
.
(1)求椭圆
的方程;
(2)设点
在椭圆
内,满足直线
,
的斜率乘积为
,且直线
,
分别交椭圆
于点
,
.
(i) 若
,
关于
轴对称,求直线
的斜率;
(ii) 求证:
的面积与
的面积相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c47ccba940649d3302cf362b664708d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1813c35af72db0e4270851643f0046a7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(i) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(ii) 求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/e343972e-44bd-4cf7-923d-f0f154a50805.png?resizew=206)
您最近一年使用:0次