1 . 正方体的平面展开图如图,
、
、
、
四条对角线两两一对得到6对对角线,在正方体中 ,这6对对角线所在直线成
角的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288dc540c3d4e2a3695d264bf78775c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
A.1对 | B.2对 | C.3对 | D.4对 |
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3卷引用:【市级联考】广东省江门市2019届高三高考模拟(第一次模拟)考试数学(文科)试题
【市级联考】广东省江门市2019届高三高考模拟(第一次模拟)考试数学(文科)试题广东省江门市2019届高考一模数学(文)试题(已下线)8.6.1 直线与直线垂直【第三练】“上好三节课,做好三套题“高中数学素养晋级之路
2 . 函数
的最小正周期是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a6ac96f175cc55e1842d2bf33c55f6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 已知数列
,
,且
.
(1)求证:
是等比数列;
(2)设
,求
的前n项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3998df04d0a8ded946c3f39d545fdc7e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a67138f29758d025473086601cef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
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解题方法
4 . 直角坐标系
中,已知两点
,
,点
满足
,其中
,且
.则点
的轨迹方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d8638349bba38af6d6d53a55634626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d53f6d504fbd7e84bd250d9cc819b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8a900d0b93f73490e7efc2e444bb016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6096acdd2d0ce16e1e45397ec5e365d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 甲、乙、丙、丁、戊5名学生进行某种劳动技能比赛,决出第1名到第5名的名次.甲、乙两名参赛者去询问成绩,回答者对甲说:“很遗憾,你和乙都未拿到冠军”,对乙说:“你当然不会是最差的”,从这个回答分析,5人的名次排列共可能有________ 种不同的情况.(用数字作答)
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22卷引用:【市级联考】广东省江门市2019届高三高考模拟(第一次模拟)考试数学(理科)试题
【市级联考】广东省江门市2019届高三高考模拟(第一次模拟)考试数学(理科)试题湖北省黄冈中学2021届高三下学期第三次模拟考试数学试题四川绵阳南山中学2021届高三高考适应性考试数学(理)试题江苏省扬州市2022届高三下学期高考前调研数学试题(B卷)湖南省长沙市雅礼中学2022届高三下学期一模数学试题海南省海口市海南中学2023届高三二模数学试题宁夏回族自治区银川一中2024届高三下学期第一次模拟考试数学(理)试题北京市海淀区育新学校2017届高三上学期12月月考数学试题浙江省宁波市宁海中学2020-2021学年高三上学期9月第一次模拟数学试题陕西省咸阳百灵学校2020-2021学年高二下学期第二次月考理科数学试题人教A版(2019) 选修第三册 一蹴而就 第六章 6.2 排列与组合 第1课时 排列(已下线)期中测试卷-2021-2022学年高二数学课后培优练(人教A版2019选择性必修第三册)湖南省长沙市雅礼中学2021-2022学年高三下学期月考数学试题(八)湖南省衡阳市第八中学2022-2023学年高二上学期期末数学试题辽宁省沈阳市第一二O中学2022-2023学年高三上学期期末数学试题黑龙江省哈尔滨市第九中学校2022-2023学年高二下学期4月月考数学试题河南省洛阳市2022-2023学年高二下学期期中考试数学(文)试题河南省洛阳市2022-2023学年高二下学期期中考试数学试题(理)(已下线)6.2.1排列+6.2.2排列数 (精讲)(2)福建省厦门市双十中学2022-2023学年高二下学期期中数学试题(已下线)微专题05 排列组合类型归纳江苏省南通市海门中学2023-2024学年高二下学期3月学情调研数学试题
6 . 已知函数
,
是常数.
Ⅰ
证明:曲线
在
处的切线经过定点;
Ⅱ
证明:函数
有且仅有一个零点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3264c0af95d32ae01b09fa84de7dc25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec5bce37c9f6932972a7dd3d084a3f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b55b22fd2e3f3b4c6cb424b535067a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9dfde5623366de792e101c74146ee4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c13a09123ae873e0b0501aaecc507e.png)
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名校
7 . 在直角坐标系Oxy中,椭圆的中心在原点,离心率为
,一个焦点是
.
Ⅰ
求椭圆的标准方程;
Ⅱ
是椭圆与y轴负半轴的交点,经过F的直线l与椭圆交于点M、N,经过B且与l平行的直线与椭圆交于点A,若
,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78c38805c09dcfbcc42103308975a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98252ff19668a1ed85614b84f948d280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d8d78794c1d77c894abce2e95849e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a991d783ea8cba20413165c72dca80.png)
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3卷引用:【市级联考】广东省江门市2019届高三高考模拟(第一次模拟)考试数学(文科)试题
8 . 随着生活质量不断提高,人们越来越重视身材保养
根据统计,我国大多数男性体重
与身高
之间近似满足关系式
、c为大于0的常数
按照某项指标测定,当体重与身高的比值在区间
内时为优等身材
现随机抽取6位成年男性,测得数据如下:
Ⅰ
从抽取的6位男性中再随机选取2位,求恰有一位优等身材的概率;
Ⅱ
对测得数据作如下处理:
,
,得相关统计量的值如表:
根据所给统计量,求y关于x的回归方程;
已知某成年男性身高为180cm,求其体重的预报值
结果精确到![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e2d6599af08a7f7433239a9e9cc73.png)
参考公式和数据:对于样本
2,
,
,其回归直线
的斜率和截距的最小二乘估计公式分别为:
,
;
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd088924708adef61bd272a52ec636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5939f7a38bffe3dddc735531dcb40a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73c8d9aa2727fa264c08a550ba7d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a999fda5febcf29a602dc236e5f65de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e9cbe7e502180ba02a33f9a0c472e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
体重![]() | 57 | 61 | 63 | 65 | 68 | 77 |
身高![]() | 163 | 167 | 170 | 177 | 181 | 185 |
体重与身高的比![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5196b6e00e1d0ea1165d0697f28881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d2d63b0ec4a0e05e86e51c1bfd430d.png)
![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce8411079aca57f17d3ead32798f055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e2d6599af08a7f7433239a9e9cc73.png)
参考公式和数据:对于样本
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7425ca571cf792c9b9cce283e29f934d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a39547dc67c842abdda01c0da97c4592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329705137c640d640b8a472b3c7a2093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23eb3f06bb24742e9a411248a90bf33b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbedf5228842359c683dbc4d4dce92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8993e3e164fdbe9da3e689ae9b2ae64d.png)
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2卷引用:【市级联考】广东省江门市2019届高三高考模拟(第一次模拟)考试数学(文科)试题
9 . 如图,三棱柱
的底面ABC是等边三角形,侧面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/553b403c-41d4-420b-a9f5-c3c67ffcfc68.png?resizew=136)
Ⅰ
求证:
;
(Ⅱ)M,N分别是棱
,
上一点,若
,
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab4629fbb62d88ec595376f3380e543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c37bd421643a9da2f1f010872a2f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c330ca78f6cc4c6b2abe06fbc4e8c1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/553b403c-41d4-420b-a9f5-c3c67ffcfc68.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c34db2029f5e22800720beb432d6da.png)
(Ⅱ)M,N分别是棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42589ec2263c315922a8260891a9766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3aad224c7a39f0ca496a62d57337d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc81bbca4ec7289484963fad4fbd44b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14bfba969045954318feeceb6480591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5b380117db6e8bb26745f29c7f5882.png)
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10 . 平面四边形
中,边
,
,对角线
.
(1)求内角
的大小;
(2)若
、
、
、
四点共圆,求边
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fe75f967e8915c9124a5d4ac420a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8cc58ef27567f0ab06eb1012aec330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de006cef9e5efbcbf74229845804650.png)
(1)求内角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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