在平面四边形ABCD中,向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/0.png)
=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/1.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/2.png)
=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/3.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/4.png)
=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/5.png)
.
(Ⅰ)若向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/6.png)
与向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/7.png)
垂直,求实数k的值;
(Ⅱ)若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237020_ST/8.png)
,求实数m,n.
考点分析:
相关试题推荐
已知关x的一元二次函数f(x)=ax
2-bx+1,设集合P={1,2,3}Q={-1,1,2,3,4},分别从集合P和Q中随机取一个数a和b得到数对(a,b).
(1)列举出所有的数对(a,b)并求函数y=f(x)有零点的概率;
(2)求函数y=f(x)在区间[1,+∞)上是增函数的概率.
查看答案
已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237018_ST/0.png)
.
(1)求函数f(x)的最小正周期和图象的对称轴方程;
(2)求函数f(x)在区间
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237018_ST/1.png)
上的值域.
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237017_ST/images0.png)
如图,在四棱锥P-ABCD中,底面ABCD是边长为a的正方形,E、F分别为PC、BD的中点,侧面PAD⊥底面ABCD,且PA=PD=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237017_ST/0.png)
AD.
(1)求证:EF∥平面PAD;
(2)求三棱锥C-PBD的体积.
查看答案
已知f(x)是定义在实数集上的奇函数,且当x>0时,f(x)=x
2+2x+3,求函数f(x)的解析式,并写出其单调区间.
查看答案
已知下列命题:
①
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103100038701123746/SYS201311031000387011237015_ST/0.png)
意味着x每增加一个单位,y平均增加8个单位
②投掷一颗骰子实验,有掷出的点数为奇数和掷出的点数为偶数两个基本事件
③互斥事件不一定是对立事件,但对立事件一定是互斥事件
④在适宜的条件下种下一颗种子,观察它是否发芽,这个实验为古典概型
其中正确的命题有
.
查看答案