陕西省吴起高级中学2018_2019学年高二数学上学期期末考试试题(基础)文.doc

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1 -吴起高级中学 20182019 学年第一学期期末考试高二文科数学基础卷说明:本试卷分第卷(选择题)和第卷(非选择题)两部分。满分 150 分,考试时间120 分钟。第卷(选择题 共 60 分)一、选择题:(共 12 小题,每小题 5 分,共计 60 分)1.下列命题为真命题的是( )A. B. ab,c若 则 ab,cb若 则C. D. 2,若 则 1,若 则2. 的( )1sinA30是A充分不必要条件 B必要不充分条件C充要条件 D既不充分也不必要条件3.命题“ ,使得 ”的否定是( )0x02xA. ,使得 0 B. ,都有 3或 319.(12 分)解:由题意得, , ,所以a4c12b所以双曲线方程为: 12yx20.(12 分)解: (1) (2)5.nn 510s21.(12 分)解: (1)b=1 (2) =ABCS322.(12 分)解:(1) a=-1,b=0 (2) 恒成立, 2cfx2cmax()f由(1)知 即有 得到 c4ma43c243c

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