山东省泰安四中2018_2019学年高一数学上学期第一次月考试题(无答案).doc

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1 -泰安四中 2019 届高一上学期第一次月考试题数学试题2018.101、选择题:(60 分)1.下列命题正确的有( )(1)成绩优秀的学生可以构成集合;(2)集合x|y=x 2-1与集合(x,y)|y=x 2-1是同一个集合;(3)集合(x,y)|xy4,那么集合(UA)( UB)等于 ( )(A)x|3f(2a) (B)f(a2)f(1-3a),求实数 a 的取值范围. 22、 (12 分)已知 a1,若函数 f(x)=ax2-2x+1 在区间1,3上的最大值为 M(a),最小值为31N(a),令 g(a)=M(a)-N(a).(1)求 g(a)的函数表达式;(2)判断函数 g(a)在区间 ,1上的单调性,并求出 g(a)的最小值.31

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