已知椭圆
,点
,过点P作椭圆的割线PAB,C为B关于x轴的对称点.求证:直线AC恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af74113f38fffeed8075e57d7f9d2533.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/4b286a0e-9831-4d84-aa0f-d484e8e350a2.png?resizew=230)
2022高三·全国·专题练习 查看更多[3]
(已下线)专题12 定比点差法及其应用 微点2 定比点差法综合应用(一)——解决定点、定值、定直线问题(已下线)第09讲 高考难点突破一:圆锥曲线的综合问题(定点问题) (精讲)-1(已下线)大招20定比分点法
更新时间:2022-07-20 09:11:13
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【推荐1】已知平面上三个向量
,
,
,其中
.
(1)若
,且
,求
的坐标;
(2)若
,且
,求
与
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f726edf8cca26e1011faa7101c506e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eca8fb20438505791369da9abe4a804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6433f98b702100f5fba0844361be7051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95266998c21cc0d8a84c35c7e21f6d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04454a8451c9765dc353b35156473a1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
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【推荐2】已知平面内三个向量:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e4c44a51564e69da61192c505afd66.png)
(1)若
,求实数
的值;
(2)设
,且满足
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e4c44a51564e69da61192c505afd66.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab9212922ea731e62193a5a43771c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd3252d148757db4637210baba2ebf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e84dfdf8b75a98c944136fc1edae30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7692ddbf9a461249c0acd6d9f016b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f2e3c176174583571c8ce879c91c4c.png)
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【推荐3】设
、
分别是
的边
、
上的点,
,
,
.
(1)若
(
、
为实数),求
的值;
(2)若
(
、
为实数),求
的值.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74a61581d965458316280968241e4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f3ddfd586ae5432f0c06e5b1a76ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a936641949d6f9daa1e9bb2679b5fc1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cea8f02768bdd7e869290d042a5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b5dc876d7dcd3c971b36d26668b1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345f310975ddb40dca94b5135c35dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32705e629d8b9187b53efeee6605af15.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d0ee8fc6d8bbd11a0cf66a86207bd69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061baa765d2939a416300de14c45b8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf97cb5e2fa09745dbb21b9bcfe9e6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698533f7cec9ad4a58bbf307bbdc93d5.png)
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【推荐1】已知椭圆
左焦点为
,点
到椭圆
上的点的距离最小值是1,离心率为
.
(1)求椭圆
的方程;
(2)设点
是椭圆上关于
轴对称的两点,
交椭圆
于另一点
,求
的内切圆半径的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a20b2739a832f9b2c78b11133a64fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
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【推荐2】已知椭圆
的左、右焦点分别为
,椭圆
过点
,直线
交
轴于
,且
为坐标原点.
(1)求椭圆
的方程;
(2)设点
是椭圆
的上顶点,过点
分别作直线
交椭圆
于
两点,设这两条直线的斜率分别为
,且
,证明:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc2210a7e09298897f6585ad08a70d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98955362e81c6a616e2f555e97fcfca1.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/03df57efff473b3cfeb8503796b7d6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec7bcf5820dfe70290259c2d7ac1ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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