满分5 >
高中数学试题 >
,求A∪B=( ) A.(-1,2) B.(-∞,0)∪(1,+∞) C.(0,...
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650791371/SYS201311012314266507913001_ST/0.png)
,求A∪B=( )
A.(-1,2)
B.(-∞,0)∪(1,+∞)
C.(0,+∞)
D.(-∞,1)∪(2,+∞)
考点分析:
相关试题推荐
已知复数z=1-2i,那么
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650791371/SYS201311012314266507913000_ST/0.png)
=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650791371/SYS201311012314266507913000_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650791371/SYS201311012314266507913000_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650791371/SYS201311012314266507913000_ST/3.png)
D.
查看答案
选修4-5:不等式选讲已知x,y,z为实数,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650661746/SYS201311012314266506617022_ST/0.png)
,
(Ⅰ)求x
2+y
2+z
2的最小值;
(Ⅱ)设|2t-1|=x
2+y
2+z
2,求实数t的取值范围.
查看答案
选修4-4:坐标系与参数方程
已知曲线C的极坐标方程为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650661746/SYS201311012314266506617021_ST/0.png)
;
(Ⅰ)若以极点为原点,极轴所在的直线为x轴,求曲线C的直角坐标方程.
(Ⅱ)若P(x,y)是曲线C上的一个动点,求3x+4y的最大值.
查看答案
(1)选修4-2:矩阵与变换
在平面直角坐标系xOy中,已知点A(0,0),B(-2,0),C(-2,1).设k为非零实数,矩阵M=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650661746/SYS201311012314266506617020_ST/0.png)
,N=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650661746/SYS201311012314266506617020_ST/1.png)
,点A、B、C在矩阵MN对应的变换下得到点分别为A
1、B
1、C
1,△A
1B
1C
1的面积是△ABC面积的2倍,求k的值.
查看答案
已知函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650661746/SYS201311012314266506617019_ST/0.png)
图象在x=1处的切线方程为2y-1=0.
(Ⅰ) 求函数f(x)的极值;
(Ⅱ)若△ABC的三个顶点(B在A、C之间)在曲线y=f(x)+ln(x-1)(x>1)上,试探究
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650661746/SYS201311012314266506617019_ST/1.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101231426650661746/SYS201311012314266506617019_ST/2.png)
的大小关系,并说明理由.
查看答案