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2018年高三数学模拟试题理科含答案.pdf

2018年高三数学模拟试题理科含答案.pdf
2018年高三数学模拟试题理科含答案.pdf

2018年高三数学模拟试题理科

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A. 10 10 B. 15 C. 310 10 D. 35 解:令1AB =则12AA =,连1A B 1C D ∥1A B ∴异面直线BE 与1CD 所成的角即1A B 与BE 所成的角。在1A BE ?中由余弦定理易得1310 cos A BE ∠=。故选C 6. 已知向量()2,1,10,||52a a b a b =?=+=,则||b = A. 5 B. 10 C.5 D. 25 解:222250||||2||520||a b a a b b b =+=++=++||5b ∴=。故选C 7. 设323log ,log 3,log 2a b c π===,则 A. a b c >> B. a c b >> C. b a c >> D. b c a >> 解:322log 2log 2log 3b c <<∴> 2233log 3log 2log 3log a b a b c π<=<∴>∴>> .故选A. 8. 若将函数()tan 04y x πωω??=+> ? ? ? 的图像向右平移6 π个单位长度后,与函数tan 6y x πω?? =+ ?? ? 的图像重合,则ω的最小值为 A .1 6 B. 14 C. 13 D. 12 解:6tan tan[(]ta )6446n y x y x x π ππππωωω??? ?=+?????? →=-=+ ? +? ????向右平移个单位 1 64 ()6 62k k k Z π π ωπωπ += ∴=+∈∴ - , 又min 1 02 ωω>∴=.故选D 9. 已知直线()()20y k x k =+>与抛物线 2:8C y x =相交于A B 、两点,F 为C 的焦点,

2018年高三理科数学模拟试卷04

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页脚内容 2 A. 3 B. 33 C. 3- D. -33 4.设双曲线2 214 y x -=上的点P 到点(0,5)的距离为6,则P 点到(0,5)-的距离是( ) A .2或 10 B.10 C.2 D.4或8 5. 下列有关命题说法正确的是( ) A. 命题p :“sin +cos = 2x x x ?∈R ,”,则p 是真命题 B .21560x x x =---=“”是“” 的必要不充分条件 C .命题2,10x x x ?∈++a ”是“()log (01)(0)a f x x a a =>≠+∞,在,上为增函数”的充要条件 6. 将函数??? ? ?-=32sin )(πx x f 的图像向右平移3π个单位得到函数)(x g 的图像,则)(x g 的一条对 称轴方程可以为( ) A. 4 3π = x B. 76 x π= C. 127π=x D. 12π=x 7.2015年高中生技能大赛中三所学校分别有3名、2名、1名学生获奖,这6名学生要排成一排合影,则同校学生排在一起的概率是 ( ) A . 130 B .115 C .110 D .1 5 8.执行如图8的程序框图,若输出S 的值是1 2 ,则a 的值可以为( ) A .2014 B .2015 C .2016 D .2017

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第二部分:阅渎选择(第11~15题,每题2分,共l0分) 阅渎下面短文,请从短文后所给各题的4个选项(A、B、C、D)中选出1个最佳 选项,并在答题卡相应位置上将该项涂黑。

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