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【广东省人大附中深圳学校2022-2023学年高二上学期期末数学试题

  • 2026-06-19 04:20:13
【广东省人大附中深圳学校2022-2023学年高二上学期期末数学试题

2022-2023学年第一学期期末考试

高二年级数学试卷

说明:本试卷有四道大题22道小题,共6页,考试用时120分钟,满分150分,请在答题卡上作答,选择题用2B铅笔填涂,要求把选项填黑填满,主观题用0.5黑色签字笔答题,主观题要答写在对应题框内,不在框内答题无效.

单选题(本大题共8小题,每小题5分,共40.在每小题列出的选项中,选出符合的一项)

1. 已知等差数列的通项公式为,则该数列的前项和取得最大值时,

A. 7B. 8C. 78D. 9

【答案】C

【解析】

【分析】先求出,再利用等差数列的前项和公式求出,再整理即可得出结果.

【详解】依题意得,则

所以当n=78时,取得最大值.

故选:C

2. 已知双曲线满足,且与椭圆有公共焦点,则双曲线的方程为(

A. B. 

C. D. 

【答案】A

【解析】

【分析】根据题意,结合椭圆与双曲线的几何性质,列出方程,求得的值,即可求解.

【详解】由椭圆的标准方程为,可得,即

因为双曲线的焦点与椭圆的焦点相同,所以双曲线中,半焦距

又因为双曲线满足,即

又由,即,解得,可得

所以双曲线的方程为.

故选:A

3. 设是等比数列,且,则

A. 12B. 24C. 30D. 32

【答案】D

【解析】

【分析】根据已知条件求得的值,再由可求得结果.

【详解】设等比数列的公比为,则

因此,.

故选:D.

【点睛】本题主要考查等比数列基本量的计算,属于基础题.

4. 如图所示,在平行六面体中,的交点,若,则

A. B. 

C. D. 

【答案】D

【解析】

【分析】根据空间向量基本定理结合空间向量线性运算求解.

【详解】由题意可得:.

故选:D.

5. 下列运算正确的是(

A. B. 

C. D. 

【答案】D

【解析】

【分析】由导数的运算法则依次对选项验证可得.

【详解】选项A,,故错误;

选项B,,故错误;

选项C, ,故错误;

选项D,,故正确

故选:D

6. 已知数列的前项和为,下列说法正确的是(

A. ,则是等差数列

B. ,则不是等比数列

C. 是等差数列,则

D. 是等比数列,且,则

【答案】C

【解析】

【分析】求出即可判断A,利用求出通项公式,再验证是否满足2,即可判断B,根据等差数列的求和公式即可判断C,取特殊值可判断D

【详解】对于A,若,则,则不是等差数列,A错误;

对于B,若,则,当时,,满足2,所以,则是等比数列,B错误;

对于C,是等差数列,则正确;

对于D,若是等比数列,当时,则错误.

故选:C

7. 美术绘图中常采用三庭五眼作图法.三庭:将整个脸部按照发际线至眉骨,眉骨至鼻底,鼻底至下颏的范围分为上庭、中庭、下庭,各占脸长的,五眼:指脸的宽度比例,以眼形长度为单位,把脸的宽度自左至右分成第一眼、第二眼、第三眼、第四眼、第五眼五等份.如图,假设三庭中一庭的高度为2cm,五眼中一眼的宽度为1cm,若图中提供的直线AB近似记为该人像的刘海边缘,且该人像的鼻尖位于中庭下边界和第三眼的中点,则该人像鼻尖到刘海边缘的距离约为(

A. 1.8cmB. 2.5cmC. 3.2cmD. 3.9cm

【答案】B

【解析】

【分析】建立平面直角坐标系,求出直线的方程,利用点到直线距离公式进行求解

【详解】解:如图,以鼻尖所在位置为原点O,中庭下边界为x轴,垂直中庭下边界为y轴,建立平面直角坐标系,则

所以

利用点斜式方程可得到直线,整理为

所以原点O到直线距离为

故选:B

8. 已知过抛物线的焦点的直线与该抛物线相交于两点,点是线段的中点,以为直径的圆与轴相交于两点,若,则

A. B. C. D. 

【答案】A

【解析】

【分析】,求得A,B的坐标,进而得到的中点M的坐标,写出圆的方程,令,求得P,Q的坐标,然后利用求解.

【详解】如图所示:

由抛物线的焦点坐标可得,所以

所以抛物线的方程为:

设直线的方程为:,设,设A轴上方,

联立,整理可得:

可得:①,

,即

可得,代入①可得:

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  1. CONNECT:[ UseTime:0.000385s ] mysql:host=127.0.0.1;port=3306;dbname=c460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000715s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000317s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000262s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000466s ]
  6. SELECT * FROM `set` [ RunTime:0.000193s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000488s ]
  8. SELECT * FROM `article` WHERE `id` = 489639 LIMIT 1 [ RunTime:0.007161s ]
  9. UPDATE `article` SET `lasttime` = 1782194749 WHERE `id` = 489639 [ RunTime:0.010722s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000392s ]
  11. SELECT * FROM `article` WHERE `id` < 489639 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000613s ]
  12. SELECT * FROM `article` WHERE `id` > 489639 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000422s ]
  13. SELECT * FROM `article` WHERE `id` < 489639 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004987s ]
  14. SELECT * FROM `article` WHERE `id` < 489639 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005832s ]
  15. SELECT * FROM `article` WHERE `id` < 489639 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002677s ]
0.104847s