内蒙古开鲁县蒙古族中学2017_2018学年高二数学下学期第二次周测试题(无答案).doc

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1、 1 -内蒙古开鲁县蒙古族中学 2017-2018 学年高二数学下学期第二次周测试题(无答案)圆锥曲线与方程和导数的计算(50 分)一、选择题(本题包括 5 个小题,每小题 5 分,共 25 分)1已知函数 xfln)(,则( )A在 ,0上递增 B在 ),0(上递减C在 e1,上递增 D在 e1,上递减2曲线 32xy在点 4,8R的切线方程是( )A 04 B 20xy C 4820xy D 420xy3设 是函数 的导函数,将 和 的图象画在同一个直角坐标系()fx()f ()f()f中,不可能正确的是( )4若函数 在 内有极小值,则( )bxf3)(31,0(A) (B) (C)

2、D) 10bb21b5设 在 内单调递增, ,则 是 的( 2:()eln1xpfmx(0), :5qm pq)充分不必要条件 必要不充分条件充分必要条件 既不充分也不必要条件- 2 -二 填空题(本题包括 3 个小题,每小题 5 分,共 15 分)6函数 5)(2xf的单调递增区间是_7已知函数 在区间 上的最大值与最小值分别为 ,则3183,MmMm8已知函数 , ,其中 2afxlngx0a若 是函数 的极值点,实数 的值是_1xhf三 解答题 (本题 10 分)9设函数 在 及 时取得极值求 a、 b 的值;32(8fxabxc12x10已知 Raxaxf 14)(3)(2(1)当 时,求函数的单调区间。1a(2)当 时,讨论函数的单调增区间。R(3)是否存在负实数 ,使 ,函数有最小值3?0,1x

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