解题方法
1 . 已知复平面上的点
对应的复数
满足
,设点
的运动轨迹为
.点
对应的数是0.
(1)证明
是一个双曲线并求其离心率
;
(2)设
的右焦点为
,其长半轴长为
,点
到直线
的距离为
(点
在
的右支上),证明:
;
(3)设
的两条渐近线分别为
,过
分别作
的平行线
分别交
于点
,则平行四边形
的面积是否是定值?若是,求该定值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9e97f066db90a8b341f8bc1cc3443d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58bf28d4fde2909e1018e870e70baa9.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dead5c5455fcbf21c809120dca4787.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a2df68b4bc2f1773ccc4d4590079cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9a1a2d4399061fc9d8921e22e1771e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b892bab45e209077e2ac309bcc6428.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3529e7875112e656eed532629c5d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3529e7875112e656eed532629c5d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224150f5b61706dc52b162d76ee5e285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9f59db2b6f4b68d28271c9727afc0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b5a39cff02408146d83d7704aa4d44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449b78bc33d57b2972713b6029f39c32.png)
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