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1、学习好资料欢迎下载2012 届高三数学一轮复习单元检测试题(5):平面向量(人教 A)本试卷分第 卷(选择题)和第 卷(非选择题)两部分。满分 150 分。考试时间120 分钟。第卷(选择题共60 分)一、选择题(本大题共12 个小题,每小题5 分,共 60 分,在每小题给出的四个选项中,只有一项是符号题目要求的。)1(文)(2011 北京西城区期末)已知点 A(1,1),点 B(2,y),向量 a(1,2),若 ABa,则实数 y 的值为()A5B6 C7D8 答案 C 解析 AB(3,y1),AB a,31y12,y7.(理)(2011 福州期末)已知向量a(1,1),b(2,x),若 a
2、 b 与 4b2a 平行,则实数x的值为()A 2B0 C1D2 答案 D 解析 ab(3,x1),4b2a(6,4x2),ab与 4b 2a 平行,36x14x2,x2,故选 D.2(2011 蚌埠二中质检)已知点A(1,0),B(1,3),向量a(2k1,2),若 ABa,则实数 k 的值为()A 2 B 1 C1 D2 答案 B 解析 AB(2,3),AB a,2(2k1)3 20,k 1,选B.3(2011 北京丰台期末)如果向量a(k,1)与 b(6,k1)共线且方向相反,那么k的值为()A 3 B2 学习好资料欢迎下载C17D.17答案 A 解析 由条件知,存在实数 0,使 a b
3、,(k,1)(6,(k1),k6k1 1,k 3,故选 A.4(文)(2011 北京朝阳区期末)在 ABC 中,M 是 BC 的中点,AM1,点 P 在 AM 上且满足 AP2PM,则 PA(PBPC)等于()A49B43C.43D.49答案 A 解析 由条件知,PA(PBPC)P A(2PM)PA AP|PA|223|MA|249.(理)(2011 黄冈期末)在平行四边形ABCD 中,E、F 分别是 BC、CD 的中点,DE 交 AF于 H,记 AB、BC分别为 a、b,则 AH()A.25a45bB.25a45bC25a45bD25a45b答案 B 解析 AFb12a,DEa12b,设 D
4、H DE,则 DH a12 b,AH ADDH a文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8
5、 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文
6、档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U
7、4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6
8、E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D
9、6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z1
10、0U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6学习好资料欢迎下载 112b,AH与AF共线且 a、b 不共线,121121,25,AH25a45b.5(2011 山东潍坊一中期末)已知向量a(1,1),b(2,n),若|ab|a b,则 n()A 3 B 1
11、C1 D3 答案 D 解析 ab(3,1n),|ab|9 n12n22n10,又 a b2n,|ab|a b,n2 2n10n2,解之得n3,故选 D.6(2011 烟台调研)已知 P 是边长为 2 的正 ABC 边 BC 上的动点,则AP(ABAC)()A最大值为8 B是定值6 C最小值为2 D与 P 的位置有关答案 B 解析 设 BC 边中点为D,则AP(ABAC)AP(2AD)2|AP|AD|cos PAD2|AD|26.7(2011 河北冀州期末)设 a,b 都是非零向量,那么命题“a 与 b 共线”是命题“|ab|a|b|”的()A充分不必要条件B必要不充分条件C充要条件D非充分非必
12、要条件答案 B 解析|a b|a|b|?a 与 b 方向相同,或a、b 至少有一个为0;而 a 与 b 共线包括a与 b 方向相反的情形,a、b都是非零向量,故选B.8(2011 甘肃天水一中期末)已知向量a(1,2),b(2,4),|c|5,若(ab)c文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5
13、H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5
14、G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U
15、3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:C
16、M5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 H
17、G5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ
18、3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6学习好资
19、料欢迎下载52,则 a与 c 的夹角为()A30B60C120D150答案 C 解析 由条件知|a|5,|b|25,ab(1,2),|ab|5,(ab)c52,55 cos 52,其中 为 ab 与 c 的夹角,60.ab a,ab 与 a 方向相反,a 与 c的夹角为120.9(文)(2011 福建厦门期末)在 ABC 中,C90,且 AC BC3,点 M 满足 BM2MA,则 CM CB等于()A2 B3 C4 D6 答案 B 解析 解法 1:如图以 C 为原点,CA、CB 为 x 轴、y 轴建立平面直角坐标系,则 A(3,0),B(0,3),设 M(x0,y0),BM2MA,x02 3x
20、0y032 y0,x02y01,CM CB(2,1)(0,3)3,故选 B.解法 2:BM2MA,BM23BA,CB CMCB(CBBM)|CB|2CB23BA92333 2223.(理)(2011 安 徽 百 校 联 考)设O为 坐 标 原 点,点A(1,1),若 点B(x,y)满 足文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3
21、U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:
22、CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4
23、HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 Z
24、Q3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编
25、码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I
26、4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8
27、 ZQ3U3Y4V1D6学习好资料欢迎下载x2y22x2y 10,1 x2,1 y2,则OA OB取得最大值时,点B 的个数是()A1 B2 C3 D无数答案 A 解析 x2y22x2y10,即(x1)2(y1)21,画出不等式组表示的平面区域如图,OA OBxy,设 x yt,则当直线y x 平移到经过点C 时,t 取最大值,故这样的点 B 有 1 个,即 C 点10(2011 宁夏银川一中检测)a,b是不共线的向量,若AB1ab,ACa2b(1,2R),则 A、B、C 三点共线的充要条件为()A1 2 1 B121 C1 21 0 D1210 答案 D 分析 由于向量 AC,AB有公共起点
28、,因此三点A、B、C 共线只要 AC,AB共线即可,根据向量共线的条件可知存在实数 使得 AC AB,然后根据平面向量基本定理得到两个方程,消去 即得结论解析 A、B、C 共线,AC,AB共线,根据向量共线的条件知存在实数 使得 AC AB,即 a2b(1ab),由于 a,b 不共线,根据平面向量基本定理得1 12,消去 得 121.11(文)(2011 北京学普教育中心)设向量 a(a1,a2),b(b1,b2),定义一种向量运算ab(a1,a2)(b1,b2)(a1b1,a2b2)已知 m 2,12,n3,0,点 P(x,y)在 ysinx文档编码:CM5H3Z10U4I4 HG5G7S8
29、N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V
30、1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3
31、Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7
32、S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y
33、4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5
34、H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5
35、G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6学习好资料欢迎下载的图象上运动,点 Q 在 yf(x)的图象上运动,且满足 OQmOPn(其中 O 为坐标原点),则 yf(x)的最大值及最小正周期分别为()A2;B2;4C.12;4D.12;答案 C 解析 设点 Q(x,y),则 OQ(x,y),由新定义的运算法则可得:(x,y)2,12(x,y)3,0 2x
36、3,12y,得x 2x3y12y,x12x6y2y,代入 ysinx,得 y12sin12x6,则f(x)12sin12x6,故选 C.(理)(2011 华安、连城、永安、漳平一中、龙海二中、泉港一中六校联考)如图,在矩形OACB 中,E 和 F 分别是边AC 和 BC 的点,满足AC3AE,BC3BF,若 OC OE OF其中 ,R,则 是()A.83B.32C.53D1 答案 B 解析 OFOBBF OB13OA,OEOAAE OA13OB,相加得 OEOF43(OAOB)43OC,文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10
37、U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N
38、6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1
39、D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z
40、10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S
41、8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4
42、V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H
43、3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6学习好资料欢迎下载 OC34OE34OF,343432.12(2011 辽宁沈阳二中阶段检测)已知非零向量AB与AC满足AB|AB|AC|AC|BC 0,且AB|AB|AC|AC|12,则 ABC 的形状为()A等腰非等边三角形B等边三角形C三边均不相等的三角形D直角三角形答案 A 分析 根据平面向量的概念与运算知,AB|AB|表示 AB方向上的单位向量,因此向量AB|
44、AB|AC|AC|平行于角A 的内角平分线 由AB|AB|AC|AC|BC0 可知,角 A 的内角平分线垂直于对边,再根据数量积的定义及AB|AB|AC|AC|12可求角 A.解析 根据AB|AB|AC|AC|BC0 知,角 A 的内角平分线与BC 边垂直,说明三角形是等腰三角形,根据数量积的定义及AB|AB|AC|AC|12可知A120.故三角形是等腰非等边的三角形点评 解答本题的关键是注意到向量AB|AB|,AC|AC|分别是向量 AB,AC方向上的单位向量,两个单位向量的和一定与角A 的内角平分线共线第卷(非选择题共90 分)二、填空题(本大题共4 个小题,每小题4 分,共 16 分,把
45、正确答案填在题中横线上)13(文)(2011 湖南长沙一中月考)设平面向量a(1,2),b(2,y),若ab,则|3ab|等于 _答案 5 解析 3ab(3,6)(2,y)(1,6y),文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档
46、编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4
47、I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E
48、8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6
49、文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10
50、U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N6E8 ZQ3U3Y4V1D6文档编码:CM5H3Z10U4I4 HG5G7S8N