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Question 1 · Single choice · 中档
(5分)(2016•天津)已知集合 $\mathbf { A } { = } \{ 1 , ~ 2 , ~ 3 \}$ $\mathrm { \bf B } { = } \{ \mathrm { { \bf y } } | \mathrm { { \bf y } } { = } 2 \mathrm { { \bf x } } - 1 , ~ \mathrm { { \bf x } } \in \mathrm { { \bf A } } \}$ ,则 $\mathbf { A } \cap \mathbf { B } = \mathbf { \Phi } \left( \mathbf { \Phi } \right.$ )
A. {1,3} B. {1,2} C. {2,3} D. {1,2,3}
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Question 2 · Free response · 中档
(5分)(2016•天津)甲、乙两人下棋,两人下成和棋的概率是$\frac{1}{2}$,甲获胜的概率是$\frac{1}{3}$,则甲不输的概率为( )
先写答案,再对照解析 等价写法不自动判错
直接输入 Formula Chemistry
π ² √ ≤ ≥ ∞ ∈ ∴
写好了,对答案
Answer key See explanation
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Question 3 · Free response · 中档
(5分)(2016•天津)将一个长方体沿相邻三个面的对角线截去一个棱锥,得到的几何体的正视图与俯视图如图所示,则该几何体的侧(左)视图为( )
正视图
俯视图
A
B
C
D
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Question 4 · Free response · 中档
(5分)(2016•天津)已知双曲线 $\frac { x ^ { 2 } } { a ^ { 2 } } - \frac { y ^ { 2 } } { b ^ { 2 } } = 1 ( a > 0 , b > 0 )$ )的焦距为 $\scriptstyle 1 2 { \sqrt { 5 } } ,$ ,且双曲 线的一条渐近线与直线 $2 \mathbf { x } ^ { + } \mathbf { y } { = } \mathbf { 0 }$ 垂直,则双曲线的方程为( ) A $\frac { \mathbf { x } ^ { 2 } } { 4 } - \mathbf { y } ^ { 2 } = 1$ B $\mathbf { x } ^ { 2 } - \frac { \mathbf { y } ^ { 2 } } { 4 } = 1$ C $\frac { 3 \mathbf { x } ^ { 2 } } { 2 0 } - \frac { 3 \mathbf { y } ^ { 2 } } { 5 } = 1$ D. $\frac { 3 \mathbf { x } ^ { 2 } } { 5 } - \frac { 3 \mathbf { y } ^ { 2 } } { 2 0 } = 1$
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Question 6 · Free response · 中档
(5分)(2016•天津)已知f(x)是定义在R上的偶函数,且在区间(﹣∞,0)上单调递增,若实数a满足f $( 2 ^ { | { \bf { a } } - 1 | } ) > { \bf { f } } { \bf { \Lambda } } ( { \bf { \Lambda } } - \sqrt { 2 } )$ ,则a的取值范围是( )A. $( \mathbf { \nabla } - \infty , \ { \frac { 1 } { 2 } } )$ B $( \ - \ \infty , \ \frac { 1 } { 2 } ) \cup ( \frac { 3 } { 2 } , \ + \infty )$ C $( { \frac { 1 } { 2 } } , \ { \frac { 3 } { 2 } } )$ D $( { \frac { 3 } { 2 } } , \ + \infty )$
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Question 7 · Single choice · 中档
(5分)(2016•天津)已知△ABC是边长为1的等边三角形,点D、E分别是边AB、BC的中点,连接DE并延长到点F,使得DE=2EF,则$\overrightarrow{AF}\cdot\overrightarrow{BC}$的值为( )
A. -$\frac{5}{8}$ B. $\frac{1}{8}$ C. $\frac{1}{4}$ D. $\frac{11}{8}$
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Question 8 · Single choice · 中档
(5分)(2016•天津)已知函数f(x)=$\sin^2\frac{\omega x}{2}+\frac{1}{2}\sin\omega x-\frac{1}{2}$(ω>0),x∈R,若f(x)在区间(π,2π)内没有零点,则ω的取值范围是( )
A. (0,$\frac{1}{8}$] B. (0,$\frac{1}{4}$]∪[$\frac{5}{8}$,1) C. (0,$\frac{5}{8}$] D. (0,$\frac{1}{8}$]∪[$\frac{1}{4}$,$\frac{5}{8}$]
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Question 9 · Free response · 中档
(5分)(2016•天津)i是虚数单位,复数z满足(1+i)$z=2$,则z的实部为
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Question 11 · Free response · 中档
(5分)(2016•天津)阅读如图所示的程序框图,运行相应的程序,则输出S的值为$\_$
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Question 12 · Free response · 中档
(5分)(2016•天津)已知圆C的圆心在x轴正半轴上,点(0, $\sqrt { 5 } )$ 圆C上,且圆心到直线 $2 \mathbf { x } - \mathbf { y } { = } 0$ 的距离为 $\frac { 4 { \sqrt { 5 } } } { 5 }$ ,则圆C的方程为
Answer key $( { \bf x } - 2 ) { \bf \theta } ^ { 2 } + { \bf y } ^ { 2 } = { 9 }$
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Question 13 · Free response · 中档
(5分)(2016•天津)如图,AB是圆的直径,弦CD与AB相交于点E,$BE=2AE=2$,$B D=ED$,则线段CE的长为
Answer key $\frac { 2 { \sqrt { 3 } } } { 3 }$
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Question 15 · Free response · 中档
(13分)(2016•天津)在$\triangle ABC$中,内角A,B,C所对的边分别为a,b,c,已知$a\sin2B=\sqrt{3}b\sin A$. (1)求B; (2)已知$\cos A=\dfrac{1}{3}$,求$\sin C$的值.
Answer key (1)$ B=\frac{\pi}{6} $;(2)$ \sin C=\frac{2\sqrt{2}}{3} $
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Question 17 · Free response · 中档
(13分)(2016•天津)如图,四边形ABCD是平行四边形,平面AED⊥平面ABCD,E F∥AB,AB=2,DE=3,BC=EF=1, $\scriptstyle \mathrm { A E = } { \sqrt { 6 } } ,$ ,∠BAD=60°,G为BC的中点
(1)求证:FG∥平面BED;
(2)求证:平面BED⊥平面AED;
(3)求直线EF与平面BED所成角的正弦值
Answer key See explanation
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