2015-2016学年广东省深圳市宝安区八年级期末数学试卷.pdf

2015-2016 学年广东省深圳市宝安区八年级（下）期末数学试卷一、选择题：每小题3 分，共 36 分1（3 分）如果 ab，则下列不等式正确的是（）Aab Ba+3b+3 C2a2b D2（3 分）下列图形中既是轴对称图形，又是中心对称图形的是（）ABCD3（3 分）如果分式有意义，则 a 的取值范围是（）Aa=1 Ba1 Ca1 Da14（3 分）正十边形的每个外角等于（）A36B18C60D 455（3 分）不等式x1x 的解集是（）Ax1 Bx2 CxDx26（3 分）如图，?ABCD 中，点 O为对角线 AC、BD的交点，点 E为 CD边的中点，连接 OE，如果 AB=4，OE=3，则?ABCD 的周长为（）A7 B10 C14 D207（3 分）下列代数式从左到右，是因式分解的是（）A（1x）（2x）=（x1）（x2）B（xy）（x+y）=x2y2C12a+a2=（a1）2 Dx22x+6=x（x2）+68（3 分）如图，?ABCD 中，点 O为对角线 AC、BD的交点，下列结论错误的是（）AAC=BD B AB DC CBO=DO D ABC=CDA9（3 分）在直角坐标平面内，将点A（1，2）先向上平移 3 个单位长度，再向右平移 5 个单位长度，得到的点A的坐标是（）A（2，3）B（6，5）C（4，1）D（4，7）10（3 分）下列命题正确的是（）A等腰三角形的角平分线、中线、高互相重合B斜边和一条直角边分别相等的两个直角三角形全等C一组对边相等，另一组对边平行的四边形是平行四边形D有一个角等于 60的三角形是等边三角形11（3 分）如图，在直角坐标系中，直线l1：y1=kx+b 与直线 l2：y2mx+n在第二象限相交于点 A（1，a），则不等式 kx+bmx+n的解集是（）Ax1 Bxa Cx1 D1x012（3 分）如图，在 ABC中，ACB=90，BAC=60，AC=1，现将 ABC绕点 C逆时针旋转至 ABC，使得点 A恰好落在 AB上，连接 BB，则 BB 的长度是（）文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2A2 B C2D3二、填空题：每小题3 分，共 12 分13（3 分）因式分解：ax2a 的结果是14（3 分）如图，RtABC中，ACB=90，AD平分 CAB，交 BC于点 D，过点 D作 DE AB于点 E，若 CD=2，EB=1，则 BD的长是15（3 分）如图，两个全等的等边三角形ABC和DCE 放置在一起，B、C、E在同一直线上，连接BD，若 AB=2，则 BD的长是16（3 分）如图，ABC绕点 C顺时针旋转45得到 ABC，若ACB=90，BC=AC=2，则图中阴影部分的面积等于三、解答题：共7 题，共 52 分17（6 分）解不等式组：，并把它的解集表示在数轴上18（6 分）先化简分式：（），并当 a=2 时，请求出分式的值19（6 分）解方程：20（8 分）如图，ABC中，C=90，A=30（1）用尺规作图作AB边上的中垂线 DE，交 AC于点 D，交 AB于点 E（保留作图痕迹，不要求写作法和证明）；（2）连接 BD，求证：BD平分 CBA 21（8 分）“端午节”前夕，某商场根据去年市场销售行情，用3 万元购进第一批文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2某品牌盒装粽子，上市后很快售完，接着又用5 万元购进第二批同种品牌盒装粽子，已知第二批所购粽子的盒数是第一批所购粽子盒数的2 倍，且每盒粽子的进价比第一批的进价少 5 元，求第一批某品牌盒装粽子每盒的进价是多少元？22（8 分）为提高饮水质量，越来越多的居民选购家用净水器，某商场利用这次商机，计划从厂家购进甲、乙两种型号的家用净水器共300台，进价与售价如下表：型号进价（元/台）售价（元/台）A150200B200300（1）设购进甲种型号净水器x 台，销售利润为 y 元，试求出 y 与 x 之间的函数关系式；（2）由于受资金限制，某商场只能用不多于50000 元的资金购进这批家用净水器，为了利润的最大化，商场该如何安排进货？并求出最大利润是多少？23（10 分）如图 1，在平面直角坐标系中，有A（2，4），B（6，0）两点，在 y 轴正半轴上取一点M（使 M、A、B不在一条直线上），连接 AB、AM、BM，取 AB的中点 C，作射线 MC，过点 A作 AN MB，交射线 MC 于点 N，连接 BN（1）求证：四边形 AMBN 是平行四边形；（2）如图 2，在（1）的条件下，将 AMN 沿直线 MN翻折，得 MA N，AN交 MB于点 F，求证：FM=FN；文档编码:CL3O9H9S6U10 HU9P10P6C1U4 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3，在（2）的条件下，当点 M移动到与坐标原点O重合时，试求直线AN的解析式2015-2016 学年广东省深圳市宝安区八年级（下）期末数学试卷参考答案一、选择题：每小题3 分，共 36 分1B；2B；3C；4A；5D；6D；7C；8A；9C；10B；11A；12B；二、填空题：每小题3 分，共 12 分13a（x+1）（x1）；14；152；1622；三、解答题：共7 题，共 52 分17；18；19；20；21；22；23；2020-2-8文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 HU9P10P6C1U4 ZS7O1A4Q4R2文档编码:CL3O9H9S6U10 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