江苏盐城市2024-2025学年高二下学期
期末考试含答案（9科试卷）
目录
1.江苏盐城市2024-2025学年高二下学期期末考试化学含答案
2.江苏盐城市2024-2025学年高二下学期期末考试物理含答案
3.江苏盐城市2024-2025学年高二下学期期末考试地理含答案
4.江苏盐城市2024-2025学年高二下学期期末考试语文含答案
5.江苏盐城市2024-2025学年高二下学期期末考试英语含答案
6.江苏盐城市2024-2025学年高二下学期期末考试生物含答案
7.江苏盐城市2024-2025学年高二下学期期末考试政治含答案
8.江苏盐城市2024-2025学年高二下学期期末考试历史含答案
9.江苏盐城市2024-2025学年高二下学期期末考试数学含答案
2024/2025学年度第二学期高二年级期终考试
数学参考答案
．．．．．．．．
1B2D3A4C5B6B7D8C
275
．．．．．．
9AD10ABD11BCD124801314
e36
15.解：（1）因为a是等差数列，所以a?S4a12，
??232
n
所以a3，··············································································································2分
2
又a9，所以公差d2，···························································································4分
5
于是aa?(n?2)d2n?1.·······················································································6分
n2
11111
（）由（）得(?)，分
21·················································10
aa(2n?1)(2n?1)22n?12n?1
nn?1
1111111111n
所以Tn(????L??)(?)