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试卷年份:{{getYear('高三|高考模拟|广东|2015年')}}上传日期:2015-06-04题数:21
提示:单击题文可显示答案与解析。
题号:836170
题型:选择题
难易度:较易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】已知f(x)=x
2,g(x)=|x﹣1|,令f
1(x)=g(f(x)),f
n+1(x)=g(f
n(x)),则方程f
2015(x)=1解的个数为( )
A.2014 | B.2015 | C.2016 | D.2017 |
题号:836171
题型:选择题
难易度:容易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】如图所示的五个区域中,中心区域是一幅图画,现要求在其余四个区域中涂色,有四种颜色可供选择.要求每个区域只涂一种颜色,相邻区域所涂颜色不同,则不同的涂色方法种数为( )
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image023.jpg)
题号:836192
题型:选择题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】设F是双曲线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image018.png)
的左焦点,A(1,4),P是双曲线右支上的动点,则|PF| +|PA|的最小值为( )
A.5 | B.![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image019.png) | C.7 | D.9 |
题号:836193
题型:选择题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】“
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image016.png)
”是“一元二次不等式
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image017.png)
的解集为R”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:836194
题型:选择题
难易度:较难
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】—个几何体的三视图及其尺寸如图所示,则该几何体的表面积为( )
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image009.png)
题号:836195
题型:选择题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
题号:836196
题型:选择题
难易度:较易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】若复数
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image001.png)
,则
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image002.png)
在复平面上对应的点在( )
题号:4182550
题型:选择题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】通过随机询问110名大学生是否爱好某项运动,得到如下的列联表
| 男
| 女
| 总计
|
爱好
| 40
| 20
| 60
|
不爱好
| 20
| 30
| 50
|
总计
| 60
| 50
| 110
|
由上表算得
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image008.png)
,因此得到的正确结论是( )
A.在犯错误的概率不超过0.1%的前提下,认为“爱好该项运动与性别有关”
B.在犯错误的概率不超过0.1%的前提下,认为“爱好该项运动与性别无关”
C.有99%以上的把握认为“爱好该项运动与性别有关”
D.有99%以上的把握认为“爱好该项运动与性别无关”
题号:836163
题型:填空题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(平面几何选做题)已知
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image076.png)
为半圆
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image077.png)
的直径,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image078.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image069.png)
为半圆上一点,过点
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image069.png)
作半圆的切线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image079.png)
,过点
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image080.png)
作
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image081.png)
于
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image082.png)
,交半圆
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image077.png)
于点
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image083.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image084.png)
,则
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image085.png)
的长为
.
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image086.png)
题号:836164
题型:填空题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(坐标系与参数方程选做题)已知直线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image066.png)
的参数方程为
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image067.png)
(
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image068.png)
为参数),曲线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image069.png)
的极坐标方程为
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image070.png)
,点
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image071.png)
是直线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image066.png)
上的一个动点,过点
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image071.png)
作曲线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image069.png)
的切线,切点为
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image072.png)
,则
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image073.png)
的最小值为
.
题号:836165
题型:填空题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】运行如图所示框图,坐标满足不等式组
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image064.png)
的点共有
个.
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image065.png)
题号:836166
题型:填空题
难易度:较易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】给出下列六种图象变换方法:
①图象上所有点的横坐标缩短到原来的
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image052.png)
,纵坐标不变;
②图象上所有点的横坐标伸长到原来的2倍,纵坐标不变;
③图象向右平移
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image053.png)
个单位;④图象向左平移
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image053.png)
个单位;
⑤图象向右平移
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image054.png)
个单位;⑥图象向左平移
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image054.png)
个单位.
请用上述变换中的两种变换,将函数
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image055.png)
的图象变换到函数
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image056.png)
的图象,那么这两种变换的序号依次是
(填上一种你认为正确的答案即可).
题号:836167
题型:填空题
难易度:困难
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】等差数列{an}前n项和为Sn,公差d<0,若S20>0,S21<0,,当Sn取得最大值时,n的值为 .
题号:836168
题型:填空题
难易度:较易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】若
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image043.png)
的展开式中所有二项式系数之和为64,则展开式的常数项为
.
题号:836158
题型:解答题
难易度:较易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(本小题满分14分)已知函数
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image305.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image306.png)
为实数)有极值,且在
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image307.png)
处的切线与直线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image308.png)
平行.
(Ⅰ)求实数a的取值范围;
(Ⅱ)是否存在实数a,使得函数
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image309.png)
的极小值为1,若存在,求出实数a的值;若不存在,请说明理由;
(Ⅲ)设函数
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image310.png)
,试判断函数
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image311.png)
在
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image312.png)
上的符号,并证明:
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image313.png)
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image314.png)
.
题号:836159
题型:解答题
难易度:较易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(本小题满分14分)如图,椭圆
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image267.png)
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image268.png)
过点
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image269.png)
,其左、右焦点分别为
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image270.png)
,离心率
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image271.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image272.png)
是直x=上的两个动点,且
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image273.png)
.
(1)求椭圆的方程;
(2)求
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image274.png)
的最小值;
(3)以
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image274.png)
为直径的圆
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image275.png)
是否过定点?请证明你的结论.
题号:836160
题型:解答题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(本小题满分14分)在单调递增数列
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image200.png)
中,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image201.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image202.png)
,且
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image203.png)
成等差数列,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image204.png)
成等比数列,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image205.png)
.
(1)分别计算
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image206.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image207.png)
和
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image208.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image209.png)
的值;
(2)求数列
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image200.png)
的通项公式(将
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image210.png)
用
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image211.png)
表示);
(3)设数列
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image212.png)
的前
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image213.png)
项和为
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image214.png)
,证明:
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image215.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image216.png)
题号:836161
题型:解答题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(本题满分12分)甲、乙两位学生参加数学竞赛培训.现分别从他们在培训期间参加的若干次预赛成绩中随机抽取8次.记录如下:
甲:82 81 79 78 95 88 93 84
乙:92 95 80 75 83 80 90 85
(1)画出甲、乙两位学生成绩的茎叶图,指出学生乙成绩的中位数;
(2)现要从中选派一人参加数学竞赛,从平均状况和方差的角度考虑,你认为派哪位学生参加合适?请说明理由;
(3)若将频率视为概率,对学生甲在今后的三次数学竞赛成绩进行预测,记这三次成绩中高于80分的次数为
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image118.png)
,求
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image118.png)
的分布列及数学期望
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image119.png)
.
题号:836162
题型:解答题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(本题满分12分)在平面直角坐标系
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image090.png)
中,以
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image091.png)
轴为始边,锐角
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image092.png)
的终边与单位圆在第一象限交于点A,且点A的纵坐标为
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image093.png)
,锐角
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image094.png)
的终边与射线x-7y=0(
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image095.png)
)重合.
(1)求
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image096.png)
的值;
(2)求
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image097.png)
的值.
题号:836169
题型:解答题
难易度:容易
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】计算
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image040.png)
]
题号:4182551
题型:解答题
难易度:一般
日期:2015-06-04
来源:2015届广东省汕头市潮南区高三5月高考模拟理科数学试卷(带解析)
【题文】(本小题满分14分)如图,直角梯形
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image142.png)
与等腰直角三角形
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image143.png)
所在的平面互相垂直.
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image144.png)
∥
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image145.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image146.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image147.png)
,
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image148.png)
.
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image149.png)
(1)求证:
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image150.png)
;
(2)求直线
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image151.png)
与平面
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image152.png)
所成角的正弦值;
(3)线段
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image153.png)
上是否存在点
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image154.png)
,使
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image151.png)
// 平面
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image155.png)
?若存在,求出
![](http://static.zujuan.xkw.com/Upload/2015-06/04/148a85cf-ed44-4e4c-9f2e-dc5782f136ed/paper.files/image156.png)
;若不存在,说明理由.