满分5 >
高中数学试题 >
给定两个长度均为2的平面向量和,它们的夹角为150°.点C在以O为圆心的圆弧上运...
给定两个长度均为2的平面向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/0.png)
和
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/1.png)
,它们的夹角为150°.点C在以O为圆心的圆弧
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/2.png)
上运动,如图所示.若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/3.png)
,其中x,y∈R,则x+y的最大值是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/images4.png)
A.2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/4.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/5.png)
C.2
D.4
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820009_ST/6.png)
考点分析:
相关试题推荐
已知抛物线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820008_ST/0.png)
有相同的焦点F,点A是两曲线的交点,且AF⊥x轴,则双曲线的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820008_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820008_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820008_ST/3.png)
D.
查看答案
在半径为1的球内有一内接正四棱柱,正四棱柱的高为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820007_ST/0.png)
,一个动点从正四棱柱的一个顶点出发沿球面运动到达另一个顶点,则经过的最短路程是( )
A.2π
B.π
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820007_ST/1.png)
D.
查看答案
在2010年广州亚运会上,中国女排奋力拼搏,最后获得冠军.中国女排是由四个强队中选出的18人组成,其队员人数具体来源如下表:
现从这18名队员中随机选出两名代表发言,则这两人是来自于不同强队的概率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820006_ST/2.png)
D.
查看答案
f(x)是定义在R上的以4为周期的偶函数,若f(-3)>1,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820005_ST/0.png)
,则a的取值范围是( )
A.(-1,0)
B.(-∞,+∞)
C.(0,+∞)
D.(-∞,-1)∪(0,+∞)
查看答案
若实数x,y满足
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820004_ST/0.png)
且z=2x+y的最小值为4,则实数b的值为( )
A.0
B.2
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842382029/SYS201310241834418423820004_ST/1.png)
D.3
查看答案