2013高考
真题
北京中考数学真题pdf四级真题及答案下载历年四级真题下载证券交易真题下载资料分析真题下载
系列-广东理科
数学
数学高考答题卡模板高考数学答题卡模板三年级数学混合运算测试卷数学作业设计案例新人教版八年级上数学教学计划
A卷+
答案
八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案
★启用前
试卷类型:A
2013年普通高等学校招生全国统一考试(广东卷)
数学(理科)
参考公式:台体的体积公式
,其中S1,S2分别
表
关于同志近三年现实表现材料材料类招标技术评分表图表与交易pdf视力表打印pdf用图表说话 pdf
示台体的上、下底面积,h表示台体的高.
一、选择题:本大题共8小题,每小题5分,满分40分.在每小题给出的四个选项中,只有一项是符合题目要求的.
1.设集合M={x|x2+2x=0,x∈R},N={x|x2-2x=0,x∈R},则
=( )
A.{0}
B.{0,2}
C.{-2,0}
D.{-2,0,2}
2.定义域为R的四个函数y=x3,y=2x,y=x2+1,y=2sinx中,奇函数的个数是( )
A. 4
B.3
C.2
D.1
3.若复数z满足iz=2+4i,则在复平面内,z对应的点的坐标是( )
A.(2,4)
B.(2,-4)
C. (4,-2)
D.(4,2)
X
1
2
3
P
4.已知离散型随机变量X的分布列如右表,则X的数学期望E(X)=( )
A.
QUOTE
B.2
C.
QUOTE
D.3
5.某四棱台的三视图如图1所示,则该四棱台的体积是( )
A.4 B.
QUOTE
C.
QUOTE
D.6
6.设m,n是两条不同的直线,α,β是两个不同的平面,下列命题中正确的是( )
A.若
,则
B.若
,则
C.若
,则
D.若
,则
7.已知中心在原点的双曲线C的右焦点为F(3,0),离心率等于
,则C的方程是( )
A.
B.
C.
D.
8.设整数n≥4,集合X={1,2,3…,n}.令集合S={(x,y,z)|x,y,z∈X,且三条件x
ln2时
,故
,
单调递增;
综上,
的单调增区间为
和
,单调减区间为
.
(2)
∵
,∴
由(1)可知
的在(0,ln2k)上单调递减,在(ln2k,+∞)上单调递增
设
则
∵
,∴
,∴
∴
在
上单调递减.
∵
, ∴
∴
即
∴
的在(0,ln2k)上单调递减,在(ln2k,k)上单调递增.
∴
的在[0,k]上的最大值应在端点处取得.
而
,
∴当x=0时
取最大值
.
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