1 . 如图,正方形
的边长为4,F为对角线
上一动点,延长
,
交于点E,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b1fce5acb99c537df69d9d66141305.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bfd81ec358bc5dde2e7dc92e7d3387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b1fce5acb99c537df69d9d66141305.png)
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2 . 若
,
是一元二次方程
(
,a,b,c为常数)的两个根,则
,
.这个定理叫做韦达定理.
如:
,
是方程
的两个根,则
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40e391ab9d1a7d09d1d9fdb0266008b.png)
已知:M、N是方程
的两根,记
;
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48c8e0add458a80e55e272af8c6d5f6.png)
(1)
__________,
__________;(直接写出答案)
(2)当
且为整数时,猜想
,
,
之间有何关系?并证明.并利用结论求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05dd02b6f561dcf94bab8a3160108d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2821505cff9f2179795ebe2fbf01a0b.png)
如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14baa050fb08d1e22bc1f9b1309836b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b70fc850e0eec4580731c4d8c74849a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a40e391ab9d1a7d09d1d9fdb0266008b.png)
已知:M、N是方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4cdd6f27334444c1884876b9e4cfe6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a75d17cc752e7aad1212fecaf88f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c68f2eb78b2d779e37c2b6e1071fafd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48c8e0add458a80e55e272af8c6d5f6.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3dabace330ccdd9755fbcf32d5d6343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b625192d7398634a02ea24fa78ed87.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e06de381c46e58d40aaced29d9297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706ac8040e8a3110a27e671662696531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82cf33bd56baebda867a6d663b35775.png)
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3 . 综合与探究
如图,抛物线
与
轴交于
两点(点
在点
的左侧),与
轴交于点
,作直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113b0ad73b71b12103f5a443fc4aa7a4.png)
是直线下方抛物线上一动点.
(1)求
两点的坐标,并直接写出直线
的函数表达式.
(2)过点
作
轴,交直线
于点
,交直线
于点
.当
为线段
的中点时,求此时点
的坐标.
(3)在(2)的条件下,若
是直线
上一动点,试判断在平面内是否存在点
,使以
为顶点的四边形是矩形?若存在,请直接写出点
的坐标;若不存在,请说明理由.
如图,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc185742fc90c1a52d5c69bbec8f176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b5288ad85ce1ff24d0b4053a4869ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113b0ad73b71b12103f5a443fc4aa7a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/3/f1508ca3-936c-4703-ad47-8fdbbf0ba40a.png?resizew=390)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f27083267432a9352fb6677a07d461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e733a15f50fdde9ac81ac1ce6e863f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d78c4531455d4483895bba92081343f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2024-05-01更新
|
129次组卷
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3卷引用:2024年山西省吕梁市中阳县多校中考三模数学试题
4 . 已知
中,
,
.
(1)在边
上求作一点D,使得
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03dec5f11c1dcf9747edcd27a798fa56.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/23/ef78dc98-7141-4d69-8c6d-a1ed1bbdc7ca.jpg?resizew=107)
(1)在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8f1e90875c57796fde78cdc8bf9cd6.png)
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名校
5 . 四位同学在研究二次函数
时,甲同学发现函数图象的对称轴是直线
;乙同学发现当
时,
;丙同学发现函数的最小值为
;丁同学发现
是一元二次方程
的一个根,已知这四位同学中只有一位同学发现的结论是错误的,则该同学是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc37360cf03bdb9310df719d9e9b48f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab907e757047a880cce2dc79635394cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf3d3564c61e5e9c39a9e2cf2de048b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124381ba914d6d9a13fb15846db53a78.png)
A.甲 | B.乙 | C.丙 | D.丁 |
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2022-12-01更新
|
310次组卷
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5卷引用:2023年湖北省黄石市大冶市东岳中学中考一模数学试题
2023年湖北省黄石市大冶市东岳中学中考一模数学试题北京市海淀区十一学校2022~2023学年九年级上学期线上“一起练习”(一)数学试题湖南省长沙市华益中学2022-2023学年八年级下学期期末数学试题(已下线)专题22.10 二次函数章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(人教版)(已下线)专题1.10 二次函数章末拔尖卷-2023-2024学年九年级数学上册举一反三系列(浙教版)
6 . 已知m是方程式
的根,则式子
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00af836e8f77cb8d353d104ec8412ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/371ebb235c386e6a1544a93643f66a1a.png)
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7 . 已知下面三个关于x的一元二次方程ax2+bx+c=1,bx2+cx+a=﹣3,cx2+ax+b=2恰好有一个相同的实数根,则a+b+c的值为 _____ .
您最近一年使用:0次
2022-08-03更新
|
1418次组卷
|
12卷引用:辽宁省锦州市2022-2023学年九年级下学期质量调查数学试题
辽宁省锦州市2022-2023学年九年级下学期质量调查数学试题浙江省湖州市长兴县2020-2021学年八年级下学期知识点检测数学试题广西壮族自治区钦州市第四中学2022-2023学年九年级上学期9月月考数学试题(已下线)专题2.27 一元二次方程(全章复习与巩固)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)专题17.27 一元二次方程(全章复习与巩固)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(沪科版)(已下线)期末难点特训(五)和二次方程有关的期末难题-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(浙教版)(已下线)专题21.2 一元二次方程(分层练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题1.2 一元二次方程(分层练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题2.2 认识一元二次方程(分层练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)(已下线)专题26.1 全册综合测试卷-2023-2024学年九年级数学上册举一反三系列(人教版)(已下线)专题26.1 全册综合测试卷-2023-2024学年九年级数学上册举一反三系列(华东师大版)(已下线)专题5.1 全册综合测试卷-2023-2024学年九年级数学上册举一反三系列(苏科版)
8 . 已知实数
,
满足等式
,
,则
的值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3a50514e8a7c85891f24813745c966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0456219968edeea2cd730b020d69cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5047355ffe426ddbf08833e91a7049bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14db9a74e090de068133b80634e947eb.png)
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2022-05-17更新
|
2575次组卷
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11卷引用:数学(四川成都卷)-学易金卷:2023年中考第一次模拟考试卷
(已下线)数学(四川成都卷)-学易金卷:2023年中考第一次模拟考试卷重庆市黔江区2020-2021学年九年级上学期期末考试数学试题(已下线)第09讲 一元二次方程单元复习-【帮课堂】2022-2023学年九年级数学上册同步精品讲义(北师大版)天津市北辰区2022-2023学年九年级上学期期中数学试卷(已下线)专题2.27 一元二次方程(全章复习与巩固)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)(已下线)专题17.27 一元二次方程(全章复习与巩固)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(沪科版)(已下线)专题21.14 一元二次方程根与系数的关系(分层练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)(已下线)专题1.14 一元二次方程根与系数的关系(分层练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题2.14 一元二次方程的根与系数的关系(分层练习)-2023-2024学年九年级数学上册基础知识专项突破讲与练(北师大版)天津市西青区2023-2024学年九年级上学期期中数学试题山东省德州市宁津县育新中学2023-2024学年九年级上学期10月月考数学试题
9 . 如图,在△ABC中,∠B=∠CAD,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b46f62c92fdf514875403367d901ed5.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda78f6a24c559b23d523199aa5bf2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b46f62c92fdf514875403367d901ed5.png)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2957991718060032/2958582295846912/STEM/5bd2ca4e-9413-42d5-bdc9-3a764c1bca79.png?resizew=225)
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2022-04-15更新
|
459次组卷
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3卷引用:2022年江苏省九年级下学期一模数学试题
10 . 如图,二次函数
图象的一部分与x轴的一个交点坐标为
,对称轴为直线
,结合图象给出下列结论:①
;②
;③若关于x的一元二次方程
的一根是3,则另一根是
;④若点
,
,
均在二次函数图象上,则
.其中正确的结论的个数为( ).
![](https://img.xkw.com/dksih/QBM/2022/3/25/2943938721816576/2948290517221376/STEM/9374ebe3-9246-4fae-ac56-911cdefc8877.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cc6de24c9f456f41c15f609fe2c2c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0a7f9ee3c6ccaea8dd3d5ad042e5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea60773ee8a73469e207ef8e51c5f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcadc780d68166efea5f50e1745036aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e43471163e068734ed905693c9e84af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6e0627ef425ff7e2773468875d1948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1046c25b1efd10507176c42f4ff44888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b44c63a912c9f07b80fb8f5bdde7a8.png)
![](https://img.xkw.com/dksih/QBM/2022/3/25/2943938721816576/2948290517221376/STEM/9374ebe3-9246-4fae-ac56-911cdefc8877.png?resizew=182)
A.1个 | B.2个 | C.3个 | D.4个 |
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2022-03-31更新
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