如图,二次函数y=x2+bx+c的图象交x轴于A.D两点,并经过B点,对称轴交x轴于点C,连接BD,BC,已知A点坐标是(1,0),B点的坐标是(4,3).
(1)求二次函数的解析式,函数图象的顶点坐标及D点的坐标;
(2)抛物线上有一个动点P,与A.D两点构成△ADP,是否存在S△ADP=
S△BCD?若存在,请写出所有符合条件的点P的坐标;若不存在.请说明理由.
(1)求二次函数的解析式,函数图象的顶点坐标及D点的坐标;
(2)抛物线上有一个动点P,与A.D两点构成△ADP,是否存在S△ADP=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/46aeb803-462c-4d0c-b828-aab2cfd9ce90.png?resizew=164)
更新时间:2021-12-03 09:59:55
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【推荐2】定义:若
、
是方程
的两个整数根,且满足
,则称此类方程为“自然方程”.例如:
是“自然方程”.
(1)下列方程是“自然方程”的是_______;(填序号)
①
;②
;③
.
(2)若方程
是“自然方程”,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/807d62d0b5623b3bd3cb285560bf8436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e06d506162c07c88cc58ce804540c587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7654181e94f9689bbb3ef1cbf8cb592.png)
(1)下列方程是“自然方程”的是_______;(填序号)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c953049e645289d3c14df2f29ec310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987cd215b655e166d5507b7ed7169aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cef1c6de51e6d2f0aae7518a632fe0f.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6accb776562f9aae08c56a0ce2735f5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-作图题
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【推荐1】小明用描点法画抛物线
时,列出了如下表格:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/ac5ff557-d618-494a-8dfc-8d7006d7c08a.png?resizew=217)
(1)求出抛物线的解析式;
(2)补全表格,并在图中画出抛物线
的函数图象;
(3)将抛物线
向右平移2个单位长度,再向下平移3个单位长度得到抛物线
,若直线
与抛物线
和
的图象只有两个公共点,请直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8188ea1a6142507de8ab6b1695d8ff0d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/7/ac5ff557-d618-494a-8dfc-8d7006d7c08a.png?resizew=217)
![]() | … | ![]() | 0 | 1 | 2 | 3 | 4 | … |
![]() | … | 0 | ![]() | … |
(2)补全表格,并在图中画出抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
(3)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f9bd7fdb0c44b5e2e1d5a59dd6f7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】二次函数
(a,b,c是常数,且
)的自变量
与函数值
的部分对应值如下表:
(1)直接写出
的值,并求该二次函数的解析式;
(2)当
时,求函数值
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
… | 0 | 3 | 4 | … | ||
… | 0 | 4 | 0 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd98122274c7a3b2767906627721c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐3】北京冬奥会的召开掀起了全民冰雪健身的狂潮,如图是某跳台滑雪训练场的横截面示意图,取某一位置的水平线为
轴,过跳台终点
作水平线的垂线为
轴,建立平面直角坐标系,图中的抛物线
:
近似表示滑雪场地上的一座小雪坡,运动员从点
正上方
滑出,滑出后沿一段抛物线
:
运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/de479849-f334-45ba-a1ca-e5d090734895.png?resizew=172)
(1)当运动员滑到离
处的水平距离为6米时,其滑行高度为
米,求抛物线
的解析式.
(2)在(1)的条件下,当运动员滑行高度与小雪坡的竖直距离为
米时,求运动员滑出后离
处的水平距离.
(3)运动员若想滑行到小雪坡坡顶正上方时,与坡顶距离不小于
米,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c4cb418754f64c7f6b92756a2b23d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c84818cfbd9a885081cb4e3294eabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1a89c495be618bca7c4e6af85ba8ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/27/de479849-f334-45ba-a1ca-e5d090734895.png?resizew=172)
(1)当运动员滑到离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a33450ad7e5b5219a5042251cfe087b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)在(1)的条件下,当运动员滑行高度与小雪坡的竖直距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(3)运动员若想滑行到小雪坡坡顶正上方时,与坡顶距离不小于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea26c55127480224531a67cbb84f5b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐1】如图,已知抛物线经过
三点,点
的坐标为
,点
的坐标为
,点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/88c35481-16ec-449a-9bea-8af96972bf93.png?resizew=159)
(1)求抛物线的函数表达式和顶点坐标;
(2)则点
______(填“在”或“不在”)抛物线上;
(3)若点
和
都在此函数的图象上,则
______
(填“
”,“
”或“
”;
(4)当
时,则
的取值范围是____.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339f15989de551d97519643a5d94cd32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97b3c94d505e7c5bcce94afec4af3d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0573e2af8a0dc8c6a1c0af067a324f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7ede0702d2c873101e9564545d9d3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/88c35481-16ec-449a-9bea-8af96972bf93.png?resizew=159)
(1)求抛物线的函数表达式和顶点坐标;
(2)则点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb8c8429d5d48e4e31f9b8f44b8e85e.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f6f4baecf22e01bffb09de6521747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ce1dfa9afc3512791c53dd21c0847e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e482dd69ac1cf7f06552fdf25a217c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐2】在平面直角坐标系
中,抛物线
经过点
.
(1)求a的值;
(2)求抛物线的对称轴(用含m的式子表示);
(3)点
,
,
在抛物线上,若
,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06377da145128f443b0745363bd12d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29b17490ac81dcd04615d21d1e82321.png)
(1)求a的值;
(2)求抛物线的对称轴(用含m的式子表示);
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0316819e2970ad7668101a581b7c76a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96718982919e778ae41f03392d6704be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89115f3e93258b1034f7a8033e2fe459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d32c6680b605bd021f723cc4035274.png)
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【推荐1】某校开展劳动实践活动,九(1)班分配得到一块如图所示的边长为8米的正方形菜地
,由于场地调整,现将菜地改成周长不变的长方形菜地
,两块菜地的重叠部分为矩形
,不重叠两块是矩形
和矩形
,设
长为x米,
长为y米.
(2)求矩形
面积的最大值;
(3)九(1)班的亮亮同学说:“矩形
面积一定不小于矩形
的面积”,请你判断他的说法是否正确,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344164942bd5946e83cbdf1ceb98c676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6f18c9a80cdd89edce7bb775b51db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
(2)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6f18c9a80cdd89edce7bb775b51db8.png)
(3)九(1)班的亮亮同学说:“矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6f18c9a80cdd89edce7bb775b51db8.png)
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【推荐2】如图,已知抛物线
与
轴交于
、
两点,与
轴交于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/e07f4886-0f94-41da-8bcf-0523b822ed77.png?resizew=154)
(1)求抛物线的解析式;
(2)若点
为线段
上的一动点(不与
、
重合),
轴,且
交抛物线于点
,交
轴于点
,当
的面积最大时,求点P的坐标;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b8c639c851e0044ee22020324c5570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7480deb6fedddf1fb05d8cdb24be1703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/e07f4886-0f94-41da-8bcf-0523b822ed77.png?resizew=154)
(1)求抛物线的解析式;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a9a8ae6c15072d8ae52b43c8edd9cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e5cc9f108de6f3ca01e5eb84c52e.png)
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