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2016四川遂宁数学中考试题

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2016四川遂宁数学中考试题

2014年四川省遂宁市中考数学试卷 参考答案与试题解析 一、选择题(本大题共10 个小题,每小题4 分,共40 分,在每个小题给 出的四个选项中,只有一个符合题目要求.) 分)(2014??遂宁)在下列各数中,最小的数是( 根据正数大于0,0大于负数,可得答案. 本题考查了有理数比较大小,正数大于0,0大于负数是解题关键. 分)(2014??遂宁)下列计算错误的是( 负整数指数幂;有理数的减法;有理数的除法;零指数幂.菁优网版权所有 根据有理数的除法、减法法则、以及0次幂和负指数次幂即可作出判 本题主要考查了零指数幂,负指数幂的运算.负整数指数为正整数指数的倒数;任何非0 解:根据主视图和左视图为矩形是柱体,根据俯视图是圆可判断出这个几何体应该是圆柱.故选B. 本题考查由三视图确定几何体的形状,主要考查学生空间想象能力及对立体图形的认识. 分)(2014??遂宁)数据:2,5,4,5,3,4,4 的众数与中位数分 别是( 解:将数据从小到大排列为:2,3,4,4,4,5,5,众数是4,中位数是4. 本题考查了众数及中位数的知识,中位数是将一组数据从小到大(或从大到小)重新排列后,最中间的那个数(最中间两个数的平均数), 叫做这组数据的中位数. 分)(2014??遂宁)在函数y= 中,自变量x 的取值范围是( 根据分母不等于0列式计算即可得解. 本题考查了函数自变量的范围,一般从三个方面考虑:(1)当函数表达式是整式时,自变量可取全体实数; (2)当函数表达式是分式时,考虑分式的分母不能为0; (3)当函数表达式是二次根式时,被开方数非负. 分)(2014??遂宁)点A(1,2)关于x 轴对称的点的坐标是( 根据关于x轴对称点的坐标特点:横坐标不变,纵坐标互为相反数可 直接得到答案. 此题主要考查了关于x轴对称点的坐标特点,关键是掌握点的坐标的 变化规律. 分)(2014??遂宁)若O1的半径为6,O2 与O1 外切,圆心距O1O2=10, 则O2 的半径为( 解:因两圆外切,可知两圆的外径之和等于圆心距,即R+r=O1O2所以R=0102r=106=4. 分)(2014??遂宁)不等式组 解不等式得:x>2,解不等式得:x3, 不等式组的解集为2<x3, 本题考查了解一元一次不等式和解一元一次不等式组的应用,解此题的关键是能根据不等式的解集找到不等式组的解集. 分)(2014??遂宁)如图,AD 是ABC 中BAC 的角平分线,DEAB 于点E,SABC=7,DE=2,AB=4,则AC 作DFAC于F,根据角平分线上的点到角的两边距离相等可得 DE=DF,再根据SABC=SABD+SACD 列出方程求解即可. 解:如图,过点D作DFAC AD是ABC 中BAC 的角平分线,DEAB, DE=DF, 由图可知,SABC=SABD+SACD, AC2=7,解得AC=3. 本题考查了角平分线上的点到角的两边距离相等的性质,熟记性质是解题的关键. 10.(4 分)(2014?? 遂宁)如图,在RtABC 中,ACB=90,ABC=30, 将ABC AC=A′C,然后判断出A′AC是等边三角形,根据等边三角形的性质 求出ACA′=60,然后根据旋转角的定义解答即可. 解:ACB=90,ABC=30,A=9030=60, ABC 顺时针旋转至A′B′C点A′恰好落在AB AC=A′C,A′AC 是等边三角形, ACA′=60, 旋转角为60. 本题考查了旋转的性质,直角三角形两锐角互余,等边三角形的判定与性质,熟记各性质并准确识图是解题的关键. 二、填空题(本大题共5 个小题,每小题4 分,共20 11.(4分)(2014?? 遂宁)正多边形一个外角的度数是60,则该正多边 根据正多边形的每一个外角都相等,多边形的边数=36060,计算即可求解. 本题考查了多边形的内角与外角的关系,熟记正多边形的边数与外角的关系是解题的关键. 12.(4 分)(2014?? 遂宁)四川省第十二届运动会将于2014 在我市举行,我市约3810000人民热烈欢迎来自全省的运动健儿.请把数 据3810000 用科学记数法表示为 3.8110 数.确定n的值时,要看把原数变成a 时,小数点移动了多少位,n 的绝对值与小数点移动的位数相同.当原数绝对值>1 是正数;当原数的绝对值<1 解:将3810000用科学记数法表示为:3.8110 形式,其中1|a|<10,n为整数,表示时关键要正确确定a 13.(4分)(2014?? 遂宁)已知圆锥的底面半径是4,母线长是5,则该圆 锥的侧面积是 20π (结果保留π). 解:底面圆的半径为4,则底面周长=8π,侧面面积=8π5=20 本题考查了圆锥的计算,利用了圆的周长公式和扇形面积公式求解.14.(4 分)(2014?? 遂宁)我市射击队为了从甲、乙两名运动员中选出一名 运动员参加省运动会比赛,组织了选拔测试,两人分别进行了五次射击, 成绩(单位:环)如下: 10则应选择 先分别计算出甲和乙的平均数,再利用方差公式求出甲和乙的方差,最后根据方差的大小进行判断即可. 解:甲的平均数是:(10+9+8+9+9)=9, 乙的平均数是: (10+8+9+8+10)=9, 甲的方差是:S ]=0.4;乙的方差是:S 甲的成绩稳定,应选择甲运动员参加省运动会比赛. 故答案为:甲. 本题考查了方差,方差是用来衡量一组数据波动大小的量,方差越大,表明这组数据偏离平均数越大,即波动越大,数据越不稳定;反之, 方差越小,表明这组数据分布比较集中,各数据偏离平均数越小,即 波动越小,数据越稳定. 15.(4 分)(2014?? 遂宁)已知:如图,在ABC 中,点A1,B1,C1 分别是 BC、AC、AB 的中点,A2,B2,C2 分别是B1C1,A1C1,A1B1 的中点,依此类推??.若 ABC 的周长为1,则AnBnCn 的周长为 由于A1、B1、C1分别是ABC 的边BC、CA、AB 的中点,就可以得出 A1B1C1ABC,且相似比为 ,A2B2C2ABC 的相似比为 ,依此类推AnBnCn ABC 的相似比为 解:A1、B1、C1分别是ABC 的边BC、CA、AB 的中点, A1B1、A1C1、B1C1 是ABC 的中位线, A1B1C1ABC,且相似比为 A2、B2、C2分别是A1B1C1 的边B1C1、C1A1、A1B1 的中点, A2B2C2A1B1C1 且相似比为 A2B2C2ABC的相似比为 依此类推AnBnCnABC 的相似比为 ABC的周长为1, AnBnCn 的周长为 本题考查了三角形中位线定理的运用,相似三角形的判定与性质的运用,解题的关键是有相似三角形的性质: 三、计算题(本大题共3 个小题,每小题7 分,共21 16.(7分)(2014?? 遂宁)计算:(2) 分别根据有理数乘方的法则、数的开方法则、绝对值的性质计算出各数,再根据实数混合运算的法则进行计算即可; 解:原式=42+2 本题考查的是实数的运算,熟知有理数乘方的法则、数的开放法则及绝对值的性质是解答此题的关键. 17.(7 分)(2014?? 遂宁)解方程:x 解方程有多种方法,要根据实际情况进行选择.18.(7 分)(2014?? 遂宁)先化简,再求值:( 原式括号中两项通分并利用同分母分式的加法法则计算,同时利用除法法则变形,约分得到最简结果,将x 的值代入计算即可求出值. 此题考查了分式的化简求值,熟练掌握运算法则是解本题的关键.四、(本大题共3 个小题,每小题9 分,共27 19.(9分)(2014?? 遂宁)我市某超市举行店庆活动,对甲、乙两种商品实 行打折销售.打折前,购买3 件甲商品和1 件乙商品需用190 元;购买2 间甲商品和3 件乙商品需用220 元.而店庆期间,购买10 件甲商品和10 件乙商品仅需735 元,这比不打折前少花多少钱? 设甲商品单价为x,乙商品单价为y,根据购买3件甲商品和1 品需用190元;购买2 间甲商品和3 件乙商品需用220 元,列出方程 组,继而可计算购买10 件甲商品和10 件乙商品需要的花费,也可得 出比不打折前少花多少钱. 解:设甲商品单价为x,乙商品单价为y,由题意得: 则购买10件甲商品和10 件乙商品需要900 打折后实际花费735,这比不打折前少花165 本题考查了二元一次方程组的应用,解题关键是要读懂题目的意思,根据题目给出的条件,找出合适的等量关系,列出方程组,再求解. 20.(9 分)(2014?? 遂宁)已知:如图,在矩形ABCD 中,对角线AC、BD 相交于点O,E 是CD 中点,连结OE.过点C 作CFBD 交线段OE 的延长线 于点F,连结DF.求证: (1)ODEFCE; (2)四边形ODFC 是菱形. (1)根据两直线平行,内错角相等可得DOE=CFE,根据线段中点的定义可得CE=DE,然后利用“角边角”证明ODE 和FCE 全等; (2)根据全等三角形对应边相等可得OD=FC,再根据一组对边平行且 相等的四边形是平行四边形判断出四边形ODFC 是平行四边形,根据矩 形的对角线互相平分且相等可得OC=OD,然后根据邻边相等的平行四 边形是菱形证明即可. 证明:(1)CFBD,DOE=CFE, 是CD中点, CE=DE, 在ODE 和FCE ODEFCE(ASA);(2)ODEFCE, OD=FC, CFBD, 四边形ODFC 是平行四边形, 在矩形ABCD 中,OC=OD, 四边形ODFC 是菱形. 本题考查了矩形的性质,全等三角形的判定与性质,菱形的判定,熟记各性质与平行四边形和菱形的判定方法是解题的关键. 21.(9 分)(2014?? 遂宁)同时抛掷两枚材质均匀的正方体骰子, (1)通过画树状图或列表,列举出所有向上点数之和的等可能结果; (2)求向上点数之和为8 的概率P1; (3)求向上点数之和不超过5 的概率P2. (1)首先根据题意列出表格,然后由表格求得所有等可能的结果;(2)由(1)可求得向上点数之和为8 的情况,再利用概率公式即可 求得答案; (3)由(1)可求得向上点数之和不超过5 的情况,再利用概率公式 即可求得答案. 1011 12 1011 则共有36种等可能的结果; (2)向上点数之和为8 种情况,P1= (3)向上点数之和不超过5的有10 种情况, P2= 本题考查的是用列表法或画树状图法求概率.注意列表法或画树状图法可以不重复不遗漏的列出所有可能的结果,用到的知识点为:概率= 所求情况数与总情况数之比. 五、(本大题共2 个小题,每小题10 分,共20 22.(10分)(2014?? 遂宁)如图,根据图中数据完成填空,再按要求答题: sin (1)观察上述等式,猜想:在RtABC中,C=90,都有sin 的对边分别是a、b、c,利用三角函数的定义和勾股定理,证明你的猜想. (3)已知:A+B=90,且sinA= ,求sinB. (1)由前面的结论,即可猜想出:在RtABC中,C=90,都有 sin (2)在RtABC中,C=90.利用锐角三角函数的定义得出sinA= sinB=,则sin A+sin2B ,从而证明sin B=1,结合已知条件sinA=,进行求解. (2)如图,在RtABC中,C=90. sinA= ,sinB= ADB=90,BD (3)sinA=,sin 本题考查了在直角三角形中互为余角三角函数的关系,勾股定理,锐角三角函数的定义,比较简单. 23.(10 分)(2014?? 遂宁)已知:如图,反比例函数y= (1)求一次函数和反比例函数的解析式;(2)求OAB 的面积; (3)直接写出一次函数值大于反比例函数值的自变量x 的取值范围. 的坐标代入反比例函数解析式求出A的坐标,把A 的坐标代 入一次函数解析式求出即可; (2)求出直线AB 轴的交点C的坐标,求出ACO 和BOC 积相加即可;(3)根据A、B 的坐标结合图象即可得出答案. 点(1,4)分别代入反比例函数y=,一次函数y=x+b, 一次函数解析式是y=x+3;(2)如图, 时,一次函数值大于反比例函数值. 本题考查了一次函数和反比例函数的交点问题,用待定系数法求出一次函数的解析式,三角形的面积,一次函数的图象等知识点,题目具 有一定的代表性,是一道比较好的题目,用了数形结合思想. 六、(本大题共2 个小题,第24 题10 分,第25 题12 分,共22 24.(10分)(2014?? 遂宁)已知:如图,O 的直径AB 垂直于弦CD,过 的切线与直径AB的延长线相交于点P,连结PD. (1)求证:PD 的切线.(2)求证:PD =PB??PA. (3)若PD=4,tanCDB= ,求直径AB (1)连接OD、OC,证PDOPCO,求出PDO=90,根据切线的判定推出即可; (2)求出A=ADO=PDB,根据相似三角形的判定推出PDB PAD,根据相似三角形的性质得出比例式,即可得出答案; (3)根据相似得出比例式,代入即可求出答案. (1)证明:+连接OD,OC,PC 的切线,PCO=90, ABCD,AB 是直径, 弧BD=弧BC, DOP=COP, 在DOP 和COP DOPCOP(SAS),ODP=PCO=90, 的切线;(2)证明:AB 的直径,ADB=90, PDO=90, ADO=PDB=90BDO, OA=OD, A=ADO, A=PDB, =PA??PB; (3)解:DCAB, ADB=DMB=90, A+DBM=90,BDC+DBM=90, A=BDC, tanBDC= PD=4,PB=2,PA=8, AB=82=6. 本题考查了切线的判定和性质,解直角三角形,圆周角定理,相似三角形的性质和判定的应用,主要考查学生综合运用性质进行推理和计 算的能力,题目比较好,有一定的难度. 25.(12 分)(2014?? 遂宁)已知:直线l:y=2,抛物线y=ax 对称轴是y轴,且经过点(0,1),(2,0). (1)求该抛物线的解析式; (2)如图,点P 是抛物线上任意一点,过点P 作直线l 的垂线,垂足为 Q,求证:PO=PQ. (3)请你参考(2)中结论解决下列问题: (i)如图,过原点作任意直线AB,交抛物线y=ax 别过A、B两点作直线l 的垂线,垂足分别是点M、N,连结ON、OM,求证: ONOM. (ii)已知:如图,点D(1,1),试探究在该抛物线上是否存在点F, 使得FD+FO 取得最小值?若存在,求出点F 的坐标;若不存在,请说明理 +bx+c的对称轴是y 轴,就可以得出 的坐标,由勾股定理就可以求出PE和PQ 得出结论;(3)由(2)的结论就可以得出BO=BN,AO=AM,由三角形的内角和 定理记平行线的性质就可以求出MON=90而得出结论; 如图,作F′Hl 于H,DFl 于G,交抛物线与F,作F′EDG 于E,由(2)的结论根据矩形的性质可以得出结论. 抛物线的解析式为:y=(2)如图,设P(a, PQl,EQ=2, QP= +1.在RtPOE 中,由勾股定理,得 PO= PO=PQ;(3)如图,BNl,AMl, BN=BO,AM=AO,BNAM, BNO=BON,AOM=AMO,ABN+BAM=180. BNO+BON+NBO=180,AOM+AMO+OAM=180, BNO+BON+NBO+AOM+AMO+OAM=360 2BON+2AOM=180, BON+AOM=90, MON=90, ONOM; 如图,作F′Hl 于H,DFl 于G,交抛物线与F,作F′EDG EGH=GHF′=F′EG=90,FO=FG,F′H=F′O,四边形GHF′E 是矩形,FO+FD=FG+FD=DG,F′O+F′D=F′H+F′D EG=F′H, DE<DF′, DE+GE<HF′+DF′, DG<F′O+DF′, FO+FD<F′O+DF′, 是所求作的点.D(1,1), 本题考查了运用待定系数法求一次函数的解析式的运用,勾股定理的运用,平行线的性质的运用,等腰三角形的性质的运用,垂直的判定 及性质的运用,解答时求出函数的解析式是关键. 内部资料 仅供参考 *Jg&6a*CZ7H$dq8Kqqf HVZFedswSyXTy#&QA9wkxFyeQ^! dj s#XuyUP2kNXpRWXmA&UE9aQ@Gn8xp$R#͑Gx^Gj qv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3tnGK8! z89AmYWpazadNu##KN&MuWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%Mz849Gx^Gj qv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3t nGK8!z89AmYWpazadNu##KN&MuWFA5ux^Gjqv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3t nGK8!z89AmYWpazadNu##KN&MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! zn%Mz849Gx^Gj qv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3t nGK8! z89AmUE9aQ@Gn8xp$R#͑Gx^Gj qv^$UE9wEwZ#Qc@UE%&qYp@Eh5pDx2zVkum&gTXRm6X4NGpP$vSTT#&ksv*3t nGK8!z89AmYWpazadNu##KN&MuWFA5uxY7JnD6YWRrWwc^vR9CpbK! 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2016四川遂宁数学中考试题

遂宁市 2016 年初中毕业暨高中阶段学校招生考试 数学试题本试卷分为第 I 卷(选择题)第Ⅱ卷(非选择题)两部分。

总分 150 分。

考试时间 120 分钟。

第 I 卷(选择题,满分 40 分) 注意事项:1.答题前,考生务必将自己的学校、姓名用 0.5 毫米的黑色墨水签字笔填写在答题卡上。并检查条形码粘贴 是否正确。

2.准考证号、选择题使用 2B 铅笔填涂在答题卡对应题目标号的位置上,非选择题用 0.5 毫米黑色墨水签字 笔书写在答题卡对应框内,超出答题区域书写的答案无效;在草稿纸、试题卷上答题无效。

3.保持卡面清洁,不折叠、不破损。考试结束后,将答题卡收回。一、选择题(本大题共 10 个小题,每小题 4 分,共们分,在每个小题给出的四个选项中,只 有一个符合题目要求) 1、3 的相反数是 A.3 B.—3 C.2、下列运算正确的是 A. 1 ? 2 ? 1 B. 3 ? (?2) ? 6 C. aD. 3 ? (2 y ? 1) ? 6 y ? 33、下列各选项中,不是正方体表面展开图的是4、下列调查中适合普查的是 A.审查查书稿有哪些科学性错误 B.了解夏季冷饮市场上冰淇淋的质量情况 C.研究父母与孩子交流的时间量与孩子的性格之间是否有联系 D.要考察人们对保护海洋的意识 5、将点 A(2,3) 向左平移 2 个单位长度得到点 A? ,点 A? 关于 x 轴的对称点是 A?? ,则点 A?? 的坐标为 A. (0, ?3) B. (4, ?3) C. (4,3) D. (0,3)6、下列正多边形地砖中,用同一种正多边形地砖不能铺满地面的是 A.正三边形 B.正四边形 C.正六边形 D.正八边形 7、如图∠A 是⊙O 的圆周角,∠A=50°,则∠OBC 的度数为 A.30° B.40° C.50° D.60° 8、下列选项中,正确的是 A. x ? 1 有意义的条件是 x ? 1 B. 8 是最简二次根式 2 C. ( ?2) ? ?22 ? 24 ? ? 6 3第 7 题图 第 9 题图 9、坡比常用米反映斜坡的倾斜程度。如图所示,斜坡 AB 坡比为 A. 1 : 3 B. 3 :1 C. 1: 2 2 D. 2 2 :110、已知 y ? bx ? c 与抛物线 y ? ax2 ? bx ? c 在同一直角坐标系中的图像可能是第 II 卷(非选择题,满分 70 分) 注意事项:1.请用 0.5 毫米的黑色墨水签字笔在第Ⅱ卷答题卡上作答,不能答在此试卷上。

2.试卷中横线及框内注有“▲”的地方,是需要你在第Ⅱ卷答题卡上作答。二、填空题(本大题共计 9 个小题 每空 1 分 共 28 分) 11、一组数据:1,2,3,3,4,2(缺失) ▲ . 12、将Δ ABC 以 B 为旋转中心,顺时针(缺失)长为 ▲ . 13、 (缺失图)如图,矩形 DEFG 的边 EF 在(缺失) ,Δ ADG 的面积是 40,△ABC 的(缺 失)AN:AM= ▲ 。第 12 题图 第 13 题图 14、(缺失图)如图,已知菱形 ABCD 的边长(缺失)菱形 ABCD 的面积是 ▲ 15、求 21 ? 22 ? 23 ? ?????? ?2n 的值,解题过程如下: 解: 设: S ? 21 ? 22 ? 23 ? ?????? ? 2 n ① 两边同乘以 2 得: 2 S ? 21 ? 22 ? 23 ? ?????? ?2n ?1 ② 由②-①得: S ? 2n?1 ? 2 参照上面解法,计算: 1 ? 31 ? 32 ? 33 ? ?? ??? ? 3n ?三、解答题(本大题共 3 个小题,每小题 7 分,共 21 分)。3 16、计算: (?2) ? 8 ? 2cos 30 ? ( 5 ? 3) ? 2 0 017、化简:a ? 2 a 2 ? 3a ? 2 a ? 2 ? ? a 2 ? 4 a 2 ? 2a ? 1 a ? 118、如图,四边形 ABCD 是平行四边形,延长 BA 至 E,延长 DC 至 F,使得 AE=CF,连 结 EF 交 AD 于 G,交 BC 于 H。求证:△AEG≌ △CFH四、解答题(本大题共 3 个小题,每小题 9 分,共 27 分)。?2 x ? y ? 4a ? 6 ? 3x ? y ? a ? 4 的解满足 x 大于 0, y 小于 4。求 a 的取值范围。

19、关于 x、 y 的方程组 ?20、红旗连锁超市花 2000 元购进一批糖果,按 80%的利润定价无人购买,决定降价出售, 但仍无人购买,结果又一次降价后才售完,但仍盈利 45.8%,两次降价的百分率相同,问每 次降价的百分率是多少?21、已知:如图 1,在锐角Δ ABC 中,AB=c,BC=a,AC=b,AD⊥BC 于 D。AD ,则 AD ? c sin ?B ; c 在 Rt△ACD 中, sin ?C ? ▲ ,则 AD ? ▲ ; b c n B ? b s i? nC ? 所 以 , cs i ? ,即, ,进一步即得正弦定理: sin B sC in在 Rt△ABD 中, sin ?B ? a b c ? ? (此定理适合任意锐角三角形) 。参照利用正弦定理解答下题: sin A sin B sin C如图 2,在△ABC 中,∠B=75°,∠C=45°,BC=2,求 AB 的长。第 21 题图 1第 21 题图 2五、解答题(本大题共 2 个小题,每小题 10 分,共 20 分)。

22、 为鼓励万众创新大众创业, 市政府给予了帮商引资企业的优惠政策, 许多企业应运而生。

招商局就今年一至五月招商情况绘制如下两幅不完全的统计图。

一至五月企业分类扇形统计图 一至五月企业分类条形统计图(1)该市今年一至五月招商引资企业一共有 ▲ 家,请将条形统计图补充完整。

(2)从农业类和第三产业类企业中,任意抽取 2 家企业进行质量检测,请用列表或画树状 图的方法,求抽中 2 家企业均为农业类的概率。23、如图,正方形 ABOC 的面积为 4,反比例函数 y ?k 的图像经过点 A,过点 A 的直线 xy ? ax ? b 与 y ?k 的图像相交于第三象限的点 D,且点 D 到 y 轴的距离为 4. x y? k 和一次函数 y ? ax ? b 的解析式。

x k 的图像,直接写出 y 的取值范围。

x(1)求反比例函数(2)当时,观察函数 y ?(3)直线 y ? ax ? b 与坐标轴交于(缺失)六、解答题(本大题共 2 个小题,第(缺失))。

24、 (缺失图)已知:如图,点 D 是以 AB 为直径(缺失)任意一点。连结 BD 并延长至 C (缺失) AD。过点 D 作 DE⊥AC 于 E。

(缺失) (1)求证:DE 是⊙O 的切线。

(2)求证: AD ? AE ?AB(3)若⊙O 半径确定,当△AB(缺失)求 tan ?DAC 的值。

25、 (缺失图)已知:抛物线夕 y ? x2 ? bx ? c 经过(缺失) (1)求抛物线 y ? x2 ? bx ? c (缺失) (2)如图 1,连结 AB,在 x 轴(缺失) (3) 将 抛 物 线 y ? x ? bx ? c ( 缺 失 ) 到 抛 物 线 y ? ax ? mx ? n , 直 线 y= ( 缺 失 )E( x1, y1 )、F( x2 , y2 )、(x1 ? x2 )连结(缺失)系并求 k 。

2016四川遂宁数学中考试题

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2016四川遂宁数学中考试题

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标签:2016年遂宁中考数学 2016遂宁中考物理试题 2016四川遂宁数学中考试题