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在考试中奉守诚实原则,自觉约束、规范自己的言行,严格遵守考试纪律.
任市中学2009-2010学年第二学期中期考试试卷
八年级下期数学
一、选择题:在每小题给出的四个选项中,只有一项是符合题目要求的.
(每题3分,共24分)
,分式有( )
、 2个、3个、4 个、5个
,则a =( ).
A.-2 C.
,自变量的取值范围是( ).
A. B.
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,则在同一直角坐标系内,函数和的图象大致是( ).
A. B. C. D.
6. 函数的图象如图所示,则当y<0时,的取值范围是
A. <-2 B. >-2 C. <-1 D. >-1
7. 在平面直角坐标系中,设点P到原点O的距离为,OP与x轴正方向的夹角为,则用表示点P的极坐标,显然,:点P的坐标为(1,1),
,则点Q的坐标为( )
A. B. C.(2,2) D.(2,2)
:①函数图象一定经过点(-2,-3);②函数图象在第一、三象限;③函数值y随x的增大而减小;④当时,( )个.
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二、填空题(每题3分,共21分)
,该直径用科学记数法可表示为
(3-2a,2a-5)是第三象限内的整点(横、纵坐标都为整数的点,称为整点) 则P1点的坐标是.
,则m = .
(x1,y1),点P2(x2,y2)是直线上的两个点,且x1<x2,则y1与y2的大小关系是.
(是常数,)的图象如下图所示,则不等式的解集是.
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第13题第14题第15题