如图,抛物线
与x轴交于
,
两点,与y轴交于点
.直线
与抛物线交于A,D两点,与y轴交于点E,点D的坐标为
.
(2)若点P是抛物线上的点且在直线
上方,连接
、
,求当
面积最大时点P的坐标及该面积的最大值;
(3)在y轴上是否存在点Q,使
是以
为腰的等腰三角形?若存在,直接写出点Q的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586d6b7a54a256cb0ecd0ea2d8262f6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f605a7fc2f1064fe14882ee426839db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879c0ee9d49c0446a191a265e53d8b05.png)
(2)若点P是抛物线上的点且在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
(3)在y轴上是否存在点Q,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217d37ca5469a57cb7417a2ac0d58efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
更新时间:2024-04-23 11:47:47
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】在平面直角坐标系
中,抛物线
与
轴交于点
,与
轴交于
、
两点
点
在点
的左侧
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddc3e1c103caf282d8af5dcbd9401df.png)
,
,
.
(2)线段
上有一动点
,连接
,当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0770c80c0a4d577201726f0ca83e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
的值最小时,请直接写出此时点
的坐标和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0770c80c0a4d577201726f0ca83e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
的最小值.
(3)如图2,点
为直线
上方抛物线上一点,连接
、
交于点
,连接
,记
的面积为
,
的面积为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b235f34d07126ae1a2157027cf7be0ab.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/81dea63b8ce3e51adf66cf7b9982a248.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/11d71379442f28c038d367d49422cf90.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/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eddc3e1c103caf282d8af5dcbd9401df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1158b401ca717391b6474d457721a6fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fda64cde0d402a603c22f24fa8eba2d.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d62e8aadaadebf1454fde21a390ebdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0770c80c0a4d577201726f0ca83e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0770c80c0a4d577201726f0ca83e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c8029d595ad6792877ce32532869e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa485cf3776f36aaf4abaadaf30fb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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【推荐2】某科技有限公司成功研制出一种市场急需的电子产品,已于当年投入生产并进行销售,已知生产这种电子产品的成本为4元/件,在销售过程中发现:每年的年销售量y(万件)与销售价格x(元/件)的关系如图,其中AB段为反比例函数图像的一部分,设公司销售这种电子产品的年利润为w(万元).
![](https://img.xkw.com/dksih/QBM/2022/2/8/2912177528446976/2913942034661376/STEM/effb5cc6247f41048a4f8a9805518cd9.png?resizew=250)
(1)请求出y(万件)与x(元/件)之间的函数关系式;
①求出当4≤x≤8时的函数关系式;
②求出当8<x≤28时的函数关系式.
(2)求出这种电子产品的年利润w(万元)与x(元/件)之间的函数关系式;
(3)求出年利润的最大值.
![](https://img.xkw.com/dksih/QBM/2022/2/8/2912177528446976/2913942034661376/STEM/effb5cc6247f41048a4f8a9805518cd9.png?resizew=250)
(1)请求出y(万件)与x(元/件)之间的函数关系式;
①求出当4≤x≤8时的函数关系式;
②求出当8<x≤28时的函数关系式.
(2)求出这种电子产品的年利润w(万元)与x(元/件)之间的函数关系式;
(3)求出年利润的最大值.
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【推荐1】把两个等腰直角△ABC和△ADE按如图1所示的位置摆放,将△ADE绕点A按逆时针方向旋转,如图2,连接BD,EC,设旋转角为α(0°<α<360°).
![](https://img.xkw.com/dksih/QBM/2021/9/12/2806681079685120/2810073600917504/STEM/2555f3fc-a959-417b-862a-bd001be41f4f.png)
(1)当DE⊥AC时, AD与BC的位置关系是______,AE与BC的位置关系是______;
(2)如图2,当点D在线段BE上时,求∠BEC的度数;
(3)当旋转角α=______时,△ABD的面积最大.
![](https://img.xkw.com/dksih/QBM/2021/9/12/2806681079685120/2810073600917504/STEM/2555f3fc-a959-417b-862a-bd001be41f4f.png)
(1)当DE⊥AC时, AD与BC的位置关系是______,AE与BC的位置关系是______;
(2)如图2,当点D在线段BE上时,求∠BEC的度数;
(3)当旋转角α=______时,△ABD的面积最大.
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【推荐2】如图1所示,直线AB交x轴于点
,交y轴于点
,且a、b满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/c81f1b1e-0bff-4fdd-8f67-d1e6b1dd87c4.png?resizew=542)
(1)如图1,若C的坐标为
,且
于点H,
交
于点P,试求点P的坐标;
(2)如图2,连接
,求证:
;
(3)如图3,若点D为
的中点,点M为y轴正半轴上动点,连接
,过D作
交x轴于N点,当M点在y轴正半轴上运动的过程中,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c240561788bc63f41a6703219fb66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385e249d3d706c8111dc83c0f99270da.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/c81f1b1e-0bff-4fdd-8f67-d1e6b1dd87c4.png?resizew=542)
(1)如图1,若C的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4744b427f036dfbc6db68c87cd5c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84af898e6727559f505b9085bd33b65d.png)
(3)如图3,若点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0dd5ba3078141483cf3ae27957a513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb2ed2d728b88b050c8b0a89ddcfaac.png)
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【推荐1】在平面直角坐标系
中,已知抛物线
(
)和直线
.
坐标为______;
(2)设该抛物线与直线
的一个交点为
,其横坐标为
,若
,求
的取值范围;
(3)我们规定若函数图像上存在一点
,满足
,则称点
为函数图像上“圆满点”.例如:直线
上存在的“圆满点”
,若抛物线
(
)上存在唯一的“圆满点”
,求此时
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0d202540ca1784cb709e128155c1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)设该抛物线与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812eed46a589bde8b7c78a81a8cf9b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539116852d374b0520a54caf51a14e84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)我们规定若函数图像上存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f56635924584077092ac3c7dd68837b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fda29102169e7fcfb74d175eaab2c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905a409e326bf60723f0cbf117764d82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0d202540ca1784cb709e128155c1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a51268fce97426487c3338d6ec3d571.png)
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【推荐2】如图,二次函数
的图像与
轴交于
、
两点
在
的左侧
,与
轴交于点
,点
在抛物线上,连接
,
.
(1)求抛物线的解析式;
(2)如图1,若点
在第四象限,点
在线段
上,连接
并延长交
轴于点
,连接
,记
的面积为
,
的面积为
,当
时,求点
的坐标;
(3)如图2,将线段
绕点
顺时针旋转
,得到线段
,点
是否落在二次函数图像上?通过计算说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](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/316ba5cbb31299d683ac6c7dd795db85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c46bc3b28da6a92897a0a54d52550d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](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/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/94423283-cdd9-4bfd-8cfb-7ce23c26a3f6.png?resizew=332)
(1)求抛物线的解析式;
(2)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b17b75d6a83edb110f3dd91a5f40681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31dd78e9156dcf6db93f6cbcc5b43b14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图2,将线段
![](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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐3】如图1,已知二次函数
(a、b、c为常数,且
)的图象,与x轴交于A、B两点(A点在B点左侧),与y轴交于点
,且其函数表达式可以变形为
的形式.已知点P为该抛物线在第一象限内的一动点,设其横坐标为m.
(2)连接
,过点
作
轴于点
,交
于点
,直线
交
轴于点
,连接
.
①求出直线
的函数表达式(用含有
的代数式表示);
②设四边形
的面积为
,求
关于
的函数关系式,并求
的最大值;
(3)如图2,若直线
为该二次函数图象的对称轴,交
轴于点
,直线
,
分别交直线
于点
、
.在点
运动的过程中,
是否为定值?若是,请求出该定值;若不是,请说明理由.
![](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/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d89057bac47a9d19b74b34a5fffd9d9.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
①求出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②设四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d0314d180fa3cc2dfee87a3c22adf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)如图2,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f000eef0716f7bf5c49d6d17b4467a.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系中,点A的坐标为(-1,-1),点B的坐标为(3,-3),抛物线经过A、O、B三点,连接OA、OB、AB,线段AB交y轴于点C.
![](https://img.xkw.com/dksih/QBM/2015/7/1/1573860505624576/1573860512088064/STEM/411a546bef5c4ab6ad2969424d9bf2fe.png)
(1)求抛物线及线段OB所在直线的解析式;
(2)若点P为线段OB上的一个动点(不与点O、B重合),直线PC与抛物线交于D、E两点(点D在y轴右侧),连接OD、BD.
①求△BOD 面积的最大值,并求出此时点D的坐标;
②当△OPC为等腰三角形时,直接写出点P的坐标.
![](https://img.xkw.com/dksih/QBM/2015/7/1/1573860505624576/1573860512088064/STEM/411a546bef5c4ab6ad2969424d9bf2fe.png)
(1)求抛物线及线段OB所在直线的解析式;
(2)若点P为线段OB上的一个动点(不与点O、B重合),直线PC与抛物线交于D、E两点(点D在y轴右侧),连接OD、BD.
①求△BOD 面积的最大值,并求出此时点D的坐标;
②当△OPC为等腰三角形时,直接写出点P的坐标.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】已知抛物线y=x2+kx+k﹣1.
(1)当k=3时,求抛物线与x轴的两个交点坐标;
(2)无论k取任何实数,抛物线过x轴上一定点,求定点坐标;
(3)当k=5时,设抛物线与y轴交于C点,与x轴交于A,B(点A在点B的左边)两点,连接AC,在线段AC上是否存在点D,使△ABD是直角三角形,若存在,求出点D的坐标,若不存在,请说明理由.
(4)点E(﹣1,1),点F(﹣2,2),抛物线与线段EF只有一个交点,求k的取值范围
(1)当k=3时,求抛物线与x轴的两个交点坐标;
(2)无论k取任何实数,抛物线过x轴上一定点,求定点坐标;
(3)当k=5时,设抛物线与y轴交于C点,与x轴交于A,B(点A在点B的左边)两点,连接AC,在线段AC上是否存在点D,使△ABD是直角三角形,若存在,求出点D的坐标,若不存在,请说明理由.
(4)点E(﹣1,1),点F(﹣2,2),抛物线与线段EF只有一个交点,求k的取值范围
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