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2020届吉林省吉林市高三第三次调研测试(4月) 数学 试题(解析版)

2020届吉林省吉林市高三第三次调研测试(4月) 数学 试题(解析版)
2020届吉林省吉林市高三第三次调研测试(4月) 数学 试题(解析版)

2018吉林高考理科数学真题及答案

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8.我国数学家陈景润在哥德巴赫猜想的研究中取得了世界领先的成果.哥德巴赫猜想是“每个大于2的偶数可以表示为两个素数的和”,如30723=+.在不超过30的素数中,随机选取两个不同的数,其和等于30的概率是 A . 1 12 B . 1 14 C . 1 15 D . 118 9.在长方体1111ABCD A B C D -中,1AB BC == ,1AA ,则异面直线1AD 与1DB 所成角 的余弦值为 A .15 B C D 10.若()cos sin f x x x =-在[,]a a -是减函数,则a 的最大值是 A . π 4 B . π 2 C . 3π4 D .π 11.已知()f x 是定义域为(,)-∞+∞的奇函数,满足(1)(1)f x f x -=+.若(1)2f =,则 (1)(2)(3)(50)f f f f ++++=… A .50- B .0 C .2 D .50 12.已知1F ,2F 是椭圆22 221(0)x y C a b a b +=>>:的左、右焦点,A 是C 的左顶点,点P 在 过A 的直线上,12PF F △为等腰三角形,12120F F P ∠=?,则C 的离心率为 A . 23 B . 1 2 C .13 D . 14 二、填空题:本题共4小题,每小题5分,共20分. 13.曲线2ln(1)y x =+在点(0,0)处的切线方程为__________. 14.若,x y 满足约束条件25023050x y x y x +-≥?? -+≥??-≤? ,,,则z x y =+的最大值为__________. 15.已知sin cos 1αβ+=,cos sin 0αβ+=,则sin()αβ+=__________. 16.已知圆锥的顶点为S ,母线SA , SB 所成角的余弦值为7 8 ,SA 与圆锥底面所成角为45°,若SAB △ 的面积为,则该圆锥的侧面积为__________. 三、解答题:共70分。解答应写出文字说明、证明过程或演算步骤。第17~21题为必考题, 每个试题考生都必须作答.第22、23为选考题,考生根据要求作答.

广州市高三年级调研测试英语试题及答案

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历年高考数学真题(全国卷整理版)43964

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A.B.C. D. 8.(5分)(2016?新课标Ⅰ)若a>b>1,0<c<1,则() A.a c<b c B.ab c<ba c : C.alog b c<blog a c D.log a c<log b c 9.(5分)(2016?新课标Ⅰ)执行如图的程序框图,如果输入的x=0,y=1,n=1,则输出x,y的值满足() A.y=2x B.y=3x C.y=4x D.y=5x 10.(5分)(2016?新课标Ⅰ)以抛物线C的顶点为圆心的圆交C于A、B两点,交C的准线于D、E两点.已知|AB|=4,|DE|=2,则C的焦点到准线的距离为()

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(完整版)2017年全国高考理科数学试题及答案-全国卷1

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