2025届高中毕业班适应性练习卷
数学参考答案及评分细则
评分说明:
1.本解答给出了一种或几种解法供参考,如果考生的解法与本解答不同,可根据试题的主要考查内
容比照评分标准制定相应的评分细则。
2.对计算题,当考生的解答在某一步出现错误时,如果后继部分的解答未改变该题的内容和难度,
可视影响的程度决定后继部分的给分,但不得超过该部分正确解答应给分数的一半;如果后继部分的解答
有较严重的错误,就不再给分。
3.解答右端所注分数,表示考生正确做到这一步应得的累加分数。
4.只给整数分数。选择题和填空题不给中间分。
一、选择题:本题考查基础知识和基本技能。每小题5分,满分40分。
1.C2.D3.A4.A5.B6.C7.A8.B
二、选择题:本题考查基础知识和基本技能。每小题6分,满分18分。全部选对的得6分,部分选对的
得部分分,有选错的得0分。
9.AD10.ABD11.ACD
三、填空题:本题考查基础知识和基本技能。每小题5分,满分15分。
21
12.y4x13.g(x)2x(写出一个满足条件的函数即可)14.
16
四、解答题:本题考查基础知识、基本技能、基本思想和基本经验,考查发现问题、提出问题、分析问题
和解决问题的能力。共5小题,满分77分。
15.本小题主要考查数列的基本概念、等比数列等基础知识,考查运算求解能力、逻辑推理能力等,考查
函数与方程思想、分类与整合思想等,考查数学运算、逻辑推理等核心素养,体现基础性和综合性.满
13
分分.
1a?S1,所以当n?2时,a?S1,··················································1分
解法一:()因为n+1nnn?1
??+
所以an+1anSnSn?10,························································································2分
(?)
所以an+12ann2.·································································································4分
当n1时,a2S1=+12,满足a2a,也符合an+12an.·············································5分
21
a
因为a1≠0,所以an≠0,n+12,
a
n
a
所以{}是以为首项,为公比的等比数列,································································6分
n12
所以a2n?1.·······················································································