河北省黄骅中学2018_2019学年高一数学上学期第二次月考试题2019011802175.doc

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1 -黄骅中学 20182019 年度第一学期高中一年级第二次月考数学试卷本试卷分第卷(选择题)和第卷两部分。第卷 1 至 2 页,第卷 3 至 6 页。共150 分。考试时间 120 分钟。第卷(客观题 共 60 分)注意事项:答第卷前,考生务必将自己的姓名、学号、班级及准考证号等分别写在试卷相应位置和涂在答题卡上;不能将题直接答在试卷上。一、选择题(本题共 12 小题,每小题 5 分,共 60 分)1.设集合 A=x|x4,则 AB= ( )A. B.x|00, f(1.25)1=x|x2,AB=x|21 时,CA,则 10,得 f(x)g(x),即 loga(x+1)loga(4-2x), (*)当 a1 时,由(*)可得 x+14-2x,解得 x1,又-11 时,x 的取值范围是(1,2);当 0g(x2),所以 g(x1)-g(x2)= , 所以 m0 时,令 (x)=mx 2+x+m+1,由 得-1m0,综上所述,所求实数 m 的取值范围是(-1,0) .-1221

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