江苏省淮安市高中校协作体2023-2024学年高三上学期期中联考 数学
淮安市高中校协作体2023~2024学年度第一学期高三年级期中联考数学试卷考试时间:120分钟总分:150分命题人:一、单项选择题(本大题共8小题,每小题5分,共计40分.在每小题给出的四个选项中,只有一个是符合题目要求的)1.已知集合A={x|−1≤x≤2},B={x|x2−3x−40,b>0,且f(a)⋅f(2b)=e2,则1a+2b的最小值为( )A.9B.92C.3D.15.已知sinα=2sin(¿3π2−α)¿,则sinα=2sin(¿3π2−α)¿tan(¿π4−α)=¿sinα=2sin(¿3π2−α)¿( )A.B.3C.−13D.−36.我国古代数学家刘徽在《九章算术注》...
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