(原卷)数学1
天水一中2024-2025学年高三上学期12月模拟检测试题数学(本卷满分150分,考试时间120分钟)第I卷(非选择题共60分)一、单项选择题:本题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一个选项是符合题目要求的.1.已知数列是公差不为0的等差数列,其前项和为,若,则()A.3B.C.-3D.2.在数列中,,,则()A.B.C.D.33.设,则下列不等式中恒成立的是()A.B.C.D.4.函数的定义域是()A.B.C.D.5.已知各项均为正数的等比数列{},=5,=10,则=A.B.7C.6D.6.已知na是各项均为正数的等比数列,其前n项和为nS,且nS是等差数...
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