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Question 1 · Free response · 中档
(5分)(2010•北京)(北京卷理1)集合 $\mathrm { P } { = } \{ { \mathrm { x } } { \in } Z | 0 { \le } \mathrm { x } { < } 3 \}$ $\mathbf { M } { = } \{ { \mathbf { x } } { \in } Z | { \mathbf { x } } ^ { 2 } { < } 9 \}$ ,则 $\mathrm { P } \cap \mathrm { M } =$ ( ) A.{1,2} B.{0,1,2} C $\{ \mathbf { x } | 0 { \leq } \mathbf { x } { < } 3 \}$ D $\{ \mathbf { x } | 0 { \leq } \mathbf { x } { \leq } 3 \}$
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Question 2 · Single choice · 中档
(5分)(2010•北京)在等比数列$\{a_n\}$中,$a_1=1$,公比$q\neq1$.若$a_m=a_1a_2a_3a_4a_5$,则$m=$( )
A. 9 B. 10 C. 11 D. 12
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Question 3 · Free response · 中档
(5分)(2010•北京)一个长方体去掉一个小长方体,所得几何体的正视图与侧(左)视图分别如图所,则该几何体的俯视图为( )
正(主)视图
侧(左)视图
A
B
C
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Question 4 · Free response · 中档
(5分)(2010•北京)8名学生和2位老师站成一排合影,2位老师不相邻的排法种数为( ) A $\mathrm { A } _ { 8 } { } ^ { 8 } \mathrm { A } _ { 9 } { } ^ { 2 }$ B $\mathrm { A } _ { 8 } { } ^ { 8 } \mathrm { C } _ { 9 } { } ^ { 2 }$ C ${ \mathrm { A } } _ { 8 } { } ^ { 8 } { \mathrm { A } } _ { 7 } { } ^ { 2 }$ D $\mathrm { A } _ { 8 } { } ^ { 8 } \mathrm { C } _ { 7 } { } ^ { 2 }$
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Question 5 · Single choice · 中档
(5分)(2010•北京)极坐标方程 $\begin{array} { r l } { \mathrm { ( \rho - 1 ) } } & { { } \mathrm { ( \theta - \pi ) } = 0 \mathrm { ( \rho { \geq } 0 \mathrm { ) } } } \end{array}$ 表示的图形是( )
A. 两个圆 B. 两条直线 C. 一个圆和一条射线 D. 一条直线和一条射线
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Question 6 · Single choice · 中档
(5分)(2010•北京)若 $\vec{a}$,$\vec{b}$ 是非零向量,“$\vec{a} \perp \vec{b}$”是“函数 $f(x) = (\vec{x}\vec{a} + \vec{b}) \cdot (\vec{x}\vec{b} - \vec{a})$ 为一次函数”的( )
A. 充分而不必要条件 B. 必要不充分条件 C. 充分必要条件 D. 既不充分也不必要条件
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Question 7 · Single choice · 中档
(5分)(2010•北京)设不等式组 $\left\{ \begin{array} { l l } { \mathbf { x } + \mathbf { y } - 1 1 \geqslant 0 } \\ { \qquad \ 3 \mathbf { x } - \mathbf { y } + 3 \geqslant 0 } \\ { \qquad \ 5 \mathbf { x } - 3 \mathbf { y } + 9 \leqslant 0 } \end{array} \right.$ 表示的平面区域为D,若指数函数 $\mathbf { \partial y } =$ $\mathbf { a } ^ { \mathrm { X } }$ 的图象上存在区域D上的点,则a的取值范围是( )
A. (1,3] B. [2,3] C. (1,2] D. [3,+∞]指数函数的图像与性质
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Question 8 · Single choice · 中档
(5分)(2010•北京)如图,正方体 $\mathrm { A B C D } - \mathrm { A _ { 1 } B _ { 1 } C _ { 1 } D _ { 1 } }$ 的棱长为2,动点E、F在棱 $\mathrm { \bf A } _ { 1 } \mathrm { \bf B } _ { 1 }$ 上,动点P,Q分别在棱AD,CD上,若EF=1, $\mathbf { A } _ { 1 } \mathbf { E } \mathbf { = } \mathbf { X }$ ,DQ=y,DP=z(x,y,z大于零),则四面体PEFQ的体积( )
A. $\varXi \mathbf { x } , \ \mathbf { y }$ ,z都有关 B. 与x有关,与y,z无关 C. 与y有关,与x,z无关 D. 与z有关,与x,y无关
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Question 9 · Free response · 中档
(5分)(2010•北京)在复平面内,复数 $\frac { 2 \mathbf { i } } { 1 - \mathbf { i } }$ 对应的点的坐标为 (﹣1,1)
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Question 10 · Free response · 中档
(5分)(2010•北京)在 $\triangle \mathrm { A B C }$ 中,若b=1, $c = { \sqrt { 3 } } , \ c = { \frac { 2 \pi } { 3 } }$ ,则a= 1
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Question 11 · Free response · 中档
(5分)(2010•北京)从某小学随机抽取100名同学,将他们身高(单位:厘米)数据绘制成频率分布直方图(如图).由图中数据可知$a= 0.03$
.若要从身高在[120,130﹚,[130,140﹚,[140,150]三组内的学生中,用分层抽样的方法选取18人参加一项活动,则从身高在[140,150]内的学生中选取的人数应为 3
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Question 12 · Free response · 中档
(5分)(2010•北京)如图,⊙O的弦ED,CB的延长线交于点A.若BD⊥AE,AB=4 $\scriptstyle \mathrm { B C } = 2 , \mathbf { A D } = 3$ ,则 $D E = 5 \quad ; \ C E = \_ 2 { \sqrt { 7 } } .$
Answer key See explanation
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Question 13 · Free response · 中档
(5分)(2010•北京)已知双曲线 $\frac { \mathbf { x } ^ { 2 } } { \mathsf { a } ^ { 2 } } - \frac { \mathbf { y } ^ { 2 } } { \mathsf { b } ^ { 2 } } { = } 1$ 的离心率为2,焦点与椭圆 $\frac { { \mathbf { x } } ^ { 2 } } { 2 5 } + \frac { { \mathbf { y } } ^ { 2 } } { 9 } = 1$ 的焦点相同,那么双曲线的焦点坐标为 (4,0),(﹣4,0) ;渐近线方程为 y=土 $\sqrt { 3 } \mathrm { { x } }$
Answer key (4,0),(﹣4,0); $\mathrm { y } = \pm \sqrt { 3 } \mathrm { x }$
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Question 14 · Free response · 中档
(5分)(2010•北京)如图放置的边长为1的正方形PABC沿x轴滚动.设顶点P(x,y)的轨迹方程是 $\mathbf { \nabla } [ \mathbf { y } ] = \mathbf { f } \mathbf { \nabla } \left( \mathbf { x } \right)$ ,则f(x)的最小正周期为 4
;y=f(x)在其两个相邻零点间的图象与x轴所围区域的面积为 π+1
Answer key $4 , \ \pi { + } 1$
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Question 15 · Free response · 中档
(13分)(2010•北京)已知函数f(x)=2cos2x+sin²x-4cosx. (Ⅰ)求f($\frac{\pi}{3}$)的值; (Ⅱ)求f(x)的最大值和最小值.
Answer key (Ⅰ)$-\frac{9}{4}$;(Ⅱ)最大值6,最小值$-\frac{7}{3}$
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Question 20 · Free response · 中档
(13分)(2010•北京)已知集合$S_n=\{X|X=(x_1,\ x_2,\ \ldots,\ x_n),\ x_i\in\{0,\ 1\},\ i=1,\ 2,\ \ldots,\ n\}$($n\geq2$)对于$A=(a_1,\ a_2,\ \ldots a_n)$,$B=(b_1,\ b_2,\ \ldots b_n)\in S_n$,定义$A$与$B$的差为$A-B=(|a_1-b_1|,\ |a_2-b_2|,\ \ldots |a_n-b_n|)$; $A$与$B$之间的距离为$d(A,\ B)=\sum_{i=1}^{n}|a_i-b_i|$ (Ⅰ)证明:$\forall A,\ B,\ C\in S_n$,有$A-B\in S_n$,且$d(A-C,\ B-C)=d(A,\ B)$; (Ⅱ)证明:$\forall A,\ B,\ C\in S_n$,$d(A,\ B)$,$d(A,\ C)$,$d(B,\ C)$三个数中至少有一个是偶数 (Ⅲ)设$P\subseteq S_n$,$P$中有$m$($m\geq2$)个元素,记$P$中所有两元素间距离的平均值为$\overline{d}(P)$. 证明:$\overline{d}(P)\leq\frac{mn}{2(m-1)}$.
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