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题号:1095648
题型:选择题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知
![](http://static.zujuan.xkw.com/Upload/2012-08/29/550981fc-5d59-4301-aeb8-e473e0edd811/paper.files/image001.png)
是实数,则
![](http://static.zujuan.xkw.com/Upload/2012-08/29/550981fc-5d59-4301-aeb8-e473e0edd811/paper.files/image002.png)
是
![](http://static.zujuan.xkw.com/Upload/2012-08/29/550981fc-5d59-4301-aeb8-e473e0edd811/paper.files/image003.png)
的( )
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
题号:1095649
题型:选择题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】将5个转学同学分配到
![](http://static.zujuan.xkw.com/Upload/2012-08/30/efec56bb-c70c-44db-ae90-72439e37d387/paper.files/image001.png)
三个班级,每班至少安排一个同学,其中
![](http://static.zujuan.xkw.com/Upload/2012-08/30/efec56bb-c70c-44db-ae90-72439e37d387/paper.files/image002.png)
班仅分配一个同学,那么不同的分配方案有______种( )
题号:1095650
题型:选择题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】若函数
![](http://static.zujuan.xkw.com/Upload/2012-10/26/046c109a-adb0-42c7-bc2b-ff08e6752e4b/paper.files/image001.png)
在区间
![](http://static.zujuan.xkw.com/Upload/2012-10/26/046c109a-adb0-42c7-bc2b-ff08e6752e4b/paper.files/image002.png)
上至少有两个最大值,则
![](http://static.zujuan.xkw.com/Upload/2012-10/26/046c109a-adb0-42c7-bc2b-ff08e6752e4b/paper.files/image003.png)
的最小值为
( )
题号:1095651
题型:选择题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】关于
![](http://static.zujuan.xkw.com/Upload/2012-08/29/bd574c95-2a4c-4d6a-b492-90c4aafe4b68/paper.files/image001.png)
的不等式
![](http://static.zujuan.xkw.com/Upload/2012-08/29/bd574c95-2a4c-4d6a-b492-90c4aafe4b68/paper.files/image002.png)
,在
![](http://static.zujuan.xkw.com/Upload/2012-08/29/bd574c95-2a4c-4d6a-b492-90c4aafe4b68/paper.files/image003.png)
上恒成立,则实数
![](http://static.zujuan.xkw.com/Upload/2012-08/29/bd574c95-2a4c-4d6a-b492-90c4aafe4b68/paper.files/image004.png)
的范围为( )
题号:1095652
题型:选择题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image001.png)
中,
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image002.png)
,
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image003.png)
的平分线
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image004.png)
交边
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image005.png)
于
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image006.png)
,已知
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image007.png)
,且
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image008.png)
,则
![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image004.png)
的长为( )
A.1 | B.![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image009.png) | C.![](http://static.zujuan.xkw.com/Upload/2012-08/30/b5e8827e-5eaf-44c5-89a6-2f974c05d884/paper.files/image010.png) | D.3 |
题号:1095653
题型:选择题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知数列
![](http://static.zujuan.xkw.com/Upload/2012-08/29/abded823-254a-447b-9fd3-8b46509d7608/paper.files/image001.png)
为等差数列,
![](http://static.zujuan.xkw.com/Upload/2012-08/29/abded823-254a-447b-9fd3-8b46509d7608/paper.files/image002.png)
为其前
![](http://static.zujuan.xkw.com/Upload/2012-08/29/abded823-254a-447b-9fd3-8b46509d7608/paper.files/image003.png)
项和,且
![](http://static.zujuan.xkw.com/Upload/2012-08/29/abded823-254a-447b-9fd3-8b46509d7608/paper.files/image004.png)
,则
![](http://static.zujuan.xkw.com/Upload/2012-08/29/abded823-254a-447b-9fd3-8b46509d7608/paper.files/image005.png)
( )
题号:3687723
题型:选择题
难易度:容易
日期:2012-08-01
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知约束条件
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image036.png)
,若目标函数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image037.png)
恰好仅在点
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image038.png)
处取得最大值,则
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image039.png)
的取值范围为( )
题号:3687724
题型:选择题
难易度:容易
日期:2013-02-21
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知球的半径为2,相互垂直的两个平面分别截球面得到两个圆,若两圆的公共弦长为2,则两圆的圆心距等于( )
A.1 | B.2 | C.![](http://static.zujuan.xkw.com/Upload/2012-09/02/009c03ef-d4eb-4bbb-a87f-e24917f1356c/paper.files/image001.png) | D.![](http://static.zujuan.xkw.com/Upload/2012-09/02/009c03ef-d4eb-4bbb-a87f-e24917f1356c/paper.files/image002.png) |
题号:3687725
题型:选择题
难易度:容易
日期:2012-08-07
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】某人进行驾驶理论测试,每做完一道题,计算机会自动显示已做题的正确率
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image050.png)
,则下列关系中不可能成立的是( )
题号:3687726
题型:选择题
难易度:
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
题号:3687727
题型:选择题
难易度:
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】记二项式
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image013.png)
展开式的各项系数和为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image014.png)
,其二项式系数和为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image015.png)
,则
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image016.png)
( )
A.1 | B.![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image017.png) | C.0 | D.不存在 |
题号:3687728
题型:选择题
难易度:
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image003.png)
是曲线
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image057.png)
上的任一点,若曲线在
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image003.png)
点处的切线的倾斜角是均不小于
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image058.png)
的锐角,则实数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image039.png)
的取值范围是( )
题号:1095644
题型:填空题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】定义在
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image081.png)
上的函数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image082.png)
满足
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image083.png)
,且当
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image084.png)
时,
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image085.png)
,则当
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image086.png)
时,
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image082.png)
的解析式为__________________
题号:1095645
题型:填空题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】在
![](http://static.zujuan.xkw.com/Upload/2012-08/30/222c575b-6316-4884-b14d-4a922623dba2/paper.files/image001.png)
中,已知
![](http://static.zujuan.xkw.com/Upload/2012-08/30/222c575b-6316-4884-b14d-4a922623dba2/paper.files/image002.png)
,则下列结论中正确的是_______
①
![](http://static.zujuan.xkw.com/Upload/2012-08/30/222c575b-6316-4884-b14d-4a922623dba2/paper.files/image001.png)
可能为锐角三角形;
②
![](http://static.zujuan.xkw.com/Upload/2012-08/30/222c575b-6316-4884-b14d-4a922623dba2/paper.files/image003.png)
;
③若边
![](http://static.zujuan.xkw.com/Upload/2012-08/30/222c575b-6316-4884-b14d-4a922623dba2/paper.files/image004.png)
均为整数,则
![](http://static.zujuan.xkw.com/Upload/2012-08/30/222c575b-6316-4884-b14d-4a922623dba2/paper.files/image001.png)
的面积最小为
![](http://static.zujuan.xkw.com/Upload/2012-08/30/222c575b-6316-4884-b14d-4a922623dba2/paper.files/image005.png)
.
题号:1095646
题型:填空题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】若椭圆
![](http://static.zujuan.xkw.com/Upload/2012-08/31/46e2621f-1fc6-47dc-be34-c4dfbd27c253/paper.files/image001.png)
与曲线
![](http://static.zujuan.xkw.com/Upload/2012-08/31/46e2621f-1fc6-47dc-be34-c4dfbd27c253/paper.files/image002.png)
有公共点,则椭圆的离心率
![](http://static.zujuan.xkw.com/Upload/2012-08/31/46e2621f-1fc6-47dc-be34-c4dfbd27c253/paper.files/image003.png)
的取值范围是_________________.
题号:1095647
题型:填空题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知
![](http://static.zujuan.xkw.com/Upload/2012-08/30/33f0f609-07ac-4b81-a971-34c805a86b39/paper.files/image001.png)
点为正方体
![](http://static.zujuan.xkw.com/Upload/2012-08/30/33f0f609-07ac-4b81-a971-34c805a86b39/paper.files/image002.png)
的棱
![](http://static.zujuan.xkw.com/Upload/2012-08/30/33f0f609-07ac-4b81-a971-34c805a86b39/paper.files/image003.png)
上一点,且
![](http://static.zujuan.xkw.com/Upload/2012-08/30/33f0f609-07ac-4b81-a971-34c805a86b39/paper.files/image004.png)
,则面
![](http://static.zujuan.xkw.com/Upload/2012-08/30/33f0f609-07ac-4b81-a971-34c805a86b39/paper.files/image005.png)
与面
![](http://static.zujuan.xkw.com/Upload/2012-08/30/33f0f609-07ac-4b81-a971-34c805a86b39/paper.files/image006.png)
所成二面角的正切值为_________.
题号:1095639
题型:解答题
难易度:较易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】设数列
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image008.png)
的前
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image010.png)
项和为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image009.png)
,对任意的正整数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image010.png)
,都有
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image154.png)
成立,记
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image155.png)
。
(I)求数列
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image156.png)
的通项公式;
(II)记
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image157.png)
,设数列
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image158.png)
的前
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image010.png)
项和为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image159.png)
,求证:对任意正整数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image010.png)
都有
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image160.png)
;
(III)设数列
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image156.png)
的前
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image010.png)
项和为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image161.png)
。已知正实数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image162.png)
满足:对任意正整数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image163.png)
恒成立,求
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image162.png)
的最小值。
题号:1095640
题型:解答题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知函数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image133.png)
。
(1)若
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image134.png)
为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image081.png)
上的增函数,求
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image135.png)
的取值范围。;
(2)证明:
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image136.png)
。
题号:1095641
题型:解答题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】如图所示,在正方体
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image001.png)
中,E 是
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image002.png)
的中点
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image003.jpg)
(1)求直线 BE 和平面
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image004.png)
所成的角的正弦值,
(2)在
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image005.png)
上是否存在一点 F,使从
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image006.png)
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image007.png)
平面
![](http://static.zujuan.xkw.com/Upload/2014-07/04/942b6b37-eb67-48de-93e1-f91b4f708826/paper.files/image008.png)
?证明你的结论.
题号:1095642
题型:解答题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】某次演唱比赛,需要加试文化科学素质,每位参赛选手需加答3个问题,组委会为每位选手都备有10道不同的题目可供选择,其中有5道文史类题目,3道科技类题目,2道体育类题目,测试时,每位选手从给定的10道题中不放回地随机抽取3次,每次抽取一道题,回答完该题后,再抽取下一道题目作答.
(1)求某选手第二次抽到的不是科技类题目的概率;
(2)求某选手抽到体育类题目数
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image117.png)
的分布列和数学期望E
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image117.png)
题号:1095643
题型:解答题
难易度:容易
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】已知向量
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image089.png)
,且与向量
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image090.png)
的夹角为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image091.png)
,其中
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image092.png)
是
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image018.png)
的内角.
(1)求角
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image093.png)
的大小;
(2)求
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image094.png)
的取值范围.
题号:3687729
题型:解答题
难易度:
日期:2012-02-27
来源:2012届河北省衡水中学高三调研理科数学试卷(2)
【题文】在平面直角坐标系
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image200.png)
中,设点
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image201.png)
,以线段
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image202.png)
为直径的圆经过原点
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image203.png)
.
(1)求动点
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image204.png)
的轨迹
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image205.png)
的方程;
(2)过点
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image206.png)
的直线
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image207.png)
与轨迹
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image205.png)
交于两点
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image208.png)
,点
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image209.png)
关于
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image210.png)
轴的对称点为
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image211.png)
,试判断直线
![](http://static.zujuan.xkw.com/Upload/2012-02/27/526d9de9-b744-44b7-b2af-9fcd45376f4a/paper.files/image212.png)
是否恒过一定点,并证明你的结论。