适用年级:{{getGradeNameByProperty('高三|高考模拟|广东|2011年')}} 试卷类型:{{getTestPaperTypeName('高三|高考模拟|广东|2011年')}} 使用省份:{{getAreaName('高三|高考模拟|广东|2011年')}}
试卷年份:{{getYear('高三|高考模拟|广东|2011年')}}上传日期:2011-06-03题数:21
提示:单击题文可显示答案与解析。
题号:1144282
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】设函数
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image001.png)
其中
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image002.png)
表示不超过
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image003.png)
的最大整数,如
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image004.png)
=-2,
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image005.png)
=1,
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image006.png)
=1,若直线y=
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image007.png)
与函数y=
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image008.png)
的图象恰有三个不同的交点,则
![](http://static.zujuan.xkw.com/Upload/2013-04/17/552fc643-266b-4337-994d-825776d39031/paper.files/image009.png)
的取值范围是
题号:1144283
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】在直三棱柱ABC—A
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image001.png)
B
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image001.png)
C
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image001.png)
中,
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image002.png)
分别为棱AC、AB上的动点(不包括端点),若
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image003.png)
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image004.png)
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image005.png)
则线段DE长度的取值范围为
A.
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image006.png)
B.
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image007.png)
C.
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image008.png)
D.
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c0076816-a75f-4dc7-8974-4ae151b868d5/paper.files/image009.png)
题号:1144284
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】设x,y满足约束条件
![](http://static.zujuan.xkw.com/Upload/2013-04/17/4f66a3d7-a587-4a76-a037-ce9ca36e41cf/paper.files/image001.png)
,若目标函数
![](http://static.zujuan.xkw.com/Upload/2013-04/17/4f66a3d7-a587-4a76-a037-ce9ca36e41cf/paper.files/image002.png)
的最大值为6,则
![](http://static.zujuan.xkw.com/Upload/2013-04/17/4f66a3d7-a587-4a76-a037-ce9ca36e41cf/paper.files/image003.png)
的最大值为
A.![](http://static.zujuan.xkw.com/Upload/2013-04/17/4f66a3d7-a587-4a76-a037-ce9ca36e41cf/paper.files/image004.png)
B.6 C.3 D. 2
题号:1144285
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】已知
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image001.png)
为
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image002.png)
的边
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image003.png)
的中点,
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image002.png)
所在平面内有一点
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image004.png)
,满足
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image005.png)
,设
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image006.png)
,则
![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image007.png)
的值为
A.1 | B.![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image008.png) | C.2 | D.![](http://static.zujuan.xkw.com/Upload/2013-04/17/d162d9c9-f6b3-45b0-96b4-71fbc66f4f38/paper.files/image009.png) |
题号:1144286
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】程序框图如图,如果程序运行的结果为S=132,那么判断框中应填入( )
![](http://static.zujuan.xkw.com/Upload/2017-07/14/eaabbf45-1668-4149-ab1a-48ea383bdace/paper.files/image001.png)
题号:1144287
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】已知a、b、c成等差数列,则直线
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c66479e9-c10c-42b5-81e2-39c881d02cb4/paper.files/image001.png)
被曲线
![](http://static.zujuan.xkw.com/Upload/2013-04/17/c66479e9-c10c-42b5-81e2-39c881d02cb4/paper.files/image002.png)
截得的弦长的最小值为
题号:1144288
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
题号:1144289
题型:选择题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】若
![](http://static.zujuan.xkw.com/Upload/2013-04/17/a7121b19-ffe9-4f16-809c-9d756ba336cd/paper.files/image001.png)
则
![](http://static.zujuan.xkw.com/Upload/2013-04/17/a7121b19-ffe9-4f16-809c-9d756ba336cd/paper.files/image002.png)
A.(-2,2) | B.(-2高☆考♂资♀源€网,-1) | C.(0,2) | D.(-2,0) |
题号:1144276
题型:填空题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】(几何证明选讲选做题)如图所示,圆O上一点C在直径AB上的射影为D,CD=4,BD=8,则圆O的半径等于_
题号:1144277
题型:填空题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】 (坐标系与参数方程选做题)已知圆的极坐标方程
ρ=2cos
θ,直线的极坐标方程为
ρcos
θ-2
ρsin
θ+7=0,则圆心到直线的距离为_
题号:1144278
题型:填空题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】 已知对于任意实数
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image067.gif)
,函数
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image068.gif)
满足
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image069.gif)
. 若方程
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image070.gif)
有2011个实数解,则这2011个实数解之和为
题号:1144279
题型:填空题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】掷两颗骰子得两数,则事件“两数之和大于
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image059.gif)
”的概率为_
题号:1144280
题型:填空题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】函数
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image057.gif)
的单调递增区间是_
题号:1144281
题型:填空题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
题号:4209335
题型:填空题
难易度:一般
日期:2012-12-27
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】已知椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image061.gif)
的左焦点是
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image062.gif)
,右焦点是
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image063.gif)
,点
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image022.gif)
在椭圆上,如果线段
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image064.gif)
的中点在
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image065.gif)
轴上,那么
题号:1144270
题型:解答题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】(本小题满分14分)已知各项均不为零的数列{
an}的前
n项和为
Sn,且满足
a1=
c,
2
Sn=
an an+1+
r.
(1)若
r=-6,数列{
an}能否成为等差数列?若能,求
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image221.gif)
满足的条件;若不能,请说明理由;
(2)设
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image222.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image223.gif)
,
若
r>
c>4,求证:对于一切
n∈N*,不等式
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image224.gif)
恒成立.
题号:1144271
题型:解答题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】(本小题满分14分)已知函数
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image164.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image165.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image083.gif)
为常数.
(1) 求函数
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image047.gif)
的定义域
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image166.gif)
;
(2) 若
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image167.gif)
时,对于
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image168.gif)
,比较
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image047.gif)
与
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image169.gif)
的大小;
(3) 讨论方程
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image170.gif)
解的个数.
题号:1144272
题型:解答题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】(本题满分14分)给定椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image117.gif)
>
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image118.gif)
>0
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image119.gif)
,称圆心在原点
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image120.gif)
,半径为
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image121.gif)
的圆是椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image122.gif)
的“伴随圆”.若椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image122.gif)
的一个焦点为
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image123.gif)
,其短轴上的一个端点到
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image124.gif)
的距离为
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image125.gif)
.
(1)求椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image122.gif)
的方程及其“伴随圆”方程;
(2)若倾斜角为
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image126.gif)
的直线
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image127.gif)
与椭圆C只有一个公共点,且与椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image122.gif)
的伴随圆相交于M、N两
点,求弦MN的长;
(3)点
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image128.gif)
是椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image122.gif)
的伴随圆上的一个动点,过点
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image128.gif)
作直线
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image129.gif)
,使得
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image130.gif)
与椭圆
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image122.gif)
都只有一个公共点,求证:
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image131.gif)
⊥
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image132.gif)
.
题号:1144273
题型:解答题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】(本题满分14分)如图,α⊥β,α∩β=l, A∈α, B∈β,点A在直线l上的射影为A1, 点B在l的射影为B1,已知AB=2,AA1=1, BB1=, 求:
(Ⅰ) 直线AB分别与平面α,β所成角的大小;
(Ⅱ)二面角A1-AB-B1的余弦值.
题号:1144274
题型:解答题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】(本小题满分12分)甲有一个装有
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image042.gif)
个红球、
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image065.gif)
个黑球的箱子,乙有一个装有
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image083.gif)
个红球、
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image084.gif)
个黑球的箱子,两人各自从自己的箱子里任取一球,并约定:所取两球同色时甲胜,异色时乙胜(
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image083.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image084.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image042.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image065.gif)
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image085.gif)
).
(Ⅰ)当
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image086.gif)
,时,求甲获胜的概率;
(Ⅱ)当
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image087.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image088.gif)
时,规定:甲取红球获胜得3分;取黑球获胜得1分;甲负得0分.求甲的得分期望达到最大时的
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image042.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image065.gif)
值;
(Ⅲ)当
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image089.gif)
时,这个游戏规则公平吗?请说明理由.
题号:1144275
题型:解答题
难易度:一般
日期:2011-06-03
来源:2011届广东省深圳高级中学高三高考最后模拟考试理数
【题文】(本小题满分12分) 已知向量
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image073.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image074.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image075.gif)
.
(1)若
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image076.gif)
求向量
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image077.gif)
,
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image078.gif)
的夹角;
(2)当
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image079.gif)
时,求函数
![](http://static.zujuan.xkw.com/Upload/2011-06/03/d8b37c89-6079-4295-bec0-c0d2485f13c4/paper.files/image080.gif)
的最大值。