如图,抛物线
与
轴交于
,
两点,与
轴交于点
,抛物线的顶点为
,连接BC,P为线段BC上的一个动点
不与B,C重合),过点P作
轴,交抛物线于点
,交
轴于点
.
![](https://img.xkw.com/dksih/QBM/2022/11/12/3108120402452480/3109680588300288/STEM/0fe11a23473b4671a86710f8a409f97e.png?resizew=450)
(1)求抛物线的解析式;
(2)当
时,求点
的坐标;
(3)连接CD,BD,CF,BF,当
的面积等于
的面积时(点
与点
不重合),求点
的坐标;
(4)在(3)的条件下,在
轴上是否存在点
,使
为等腰三角形?若存在,请直接写出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4218690b49de906a22dda72c578956.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62855ff21228ecea8e28fd0fbeb814ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f57b9464c57e18c4ceb2056007fd9a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b749baee563b6fd88196c75d29fc9797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2022/11/12/3108120402452480/3109680588300288/STEM/0fe11a23473b4671a86710f8a409f97e.png?resizew=450)
(1)求抛物线的解析式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b308a03141e3ca7123f03a18157116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)连接CD,BD,CF,BF,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4ce3f962c91f0d3c7b998b5fbb37b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(4)在(3)的条件下,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
更新时间:2022-11-14 22:04:15
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【推荐1】已知二次函数
.
(1)若函数图像经过点
,求
的值;
(2)求证:无论
取任何实数时,该函数图像与
轴总有交点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c344b161646efd17625e4b01fb5f136e.png)
(1)若函数图像经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa2e31608e60e3fd40c040cfe9d6e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)求证:无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】已知:如图,抛物线
与坐标轴分别交于点
,
,
,点
是线段
上方抛物线上的一个动点.
(1)求抛物线解析式;
(2)在抛物线的对称轴
上找一点
,使
的值最小,求出点M的坐标;
(3)当点
运动到什么位置时,
的面积最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1409c31d94f9ced6d37ae39c95d56a39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37df9dad3961893b22d6639c4311e267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)求抛物线解析式;
(2)在抛物线的对称轴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd50f7b773530824a9b69a1d57073f0.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53502463cc76201000e02df314e58769.png)
![](https://img.xkw.com/dksih/QBM/2020/11/26/2601281449312256/2602825549070336/STEM/82ae0728-9ee9-48c0-aa99-02e2bb95cb27.png?resizew=419)
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【推荐3】如图1,对于平面上不大于90的△MON,我们给出如下定义:若点P在△MON的内部或边界上,作PEOM于点E,PFON于点F,则称PEPF为点P相对于△MON的“点角距离”,记为dP,△MON.
如图2,在平面直角坐标系xOy中,对于△xOy,点P为第一象限内或两条坐标轴正半轴上的动点,且满足dP,△xOy5,点P运动形成的图形记为图形G.
(1)满足条件的其中一个点P的坐标是,图形G与坐标轴围成图形的面积等于多少;
(2)设图形G与x轴的公共点为点A,已知B(3,4),M(4,1),求dM,△AOB的值;
(3)如果抛物线
经过(2)中的A,B两点,点Q在A,B两点之间的抛物线上(点Q可与A,B两点重合),求当dQ,△AOB取最大值时,点Q的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/11/4a869cc7-ff6d-4094-815f-ba24545e23af.png?resizew=460)
如图2,在平面直角坐标系xOy中,对于△xOy,点P为第一象限内或两条坐标轴正半轴上的动点,且满足dP,△xOy5,点P运动形成的图形记为图形G.
(1)满足条件的其中一个点P的坐标是,图形G与坐标轴围成图形的面积等于多少;
(2)设图形G与x轴的公共点为点A,已知B(3,4),M(4,1),求dM,△AOB的值;
(3)如果抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
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【推荐1】如图,已知抛物线经过点
,
及原点
,顶点为
.
![](https://img.xkw.com/dksih/QBM/2018/11/4/2068506513195008/2069976196046848/STEM/eddb210624b84cc3b0dd8a5dfa9d4938.png?resizew=118)
(1)求抛物线的解析式:
(2)试判断
的形式,并说明理由:
(3)
是抛物线上第二象限内的动点,过点
作
轴,垂足为
,是否存在点
使得以点
、
、
为顶点的三角形与
相似?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45f8b58d0baf2b44e6c5da3372c67e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d1e864763694c8c72b1043b926f8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b2a8c80bc574fc27cb32dcb06c6679.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f015ed8e497b4394053ddd19683a98f.png)
![](https://img.xkw.com/dksih/QBM/2018/11/4/2068506513195008/2069976196046848/STEM/eddb210624b84cc3b0dd8a5dfa9d4938.png?resizew=118)
(1)求抛物线的解析式:
(2)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a60c42b868137af74d87ee92be51e0d8.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b446bcf68d7af7953c9324e2b272be06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f1796428c2600bbbdff746b0311583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f1796428c2600bbbdff746b0311583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c2bb7be2e9410a16502268fd4c67be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a60c42b868137af74d87ee92be51e0d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
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【推荐2】一块矩形耕地的尺寸如图所示,要在这块地上沿东西方向挖一条水渠,沿南北方向挖两条水渠,水渠的宽均为xm,余下的可耕地面积为ym2.
![](https://img.xkw.com/dksih/QBM/2019/9/20/2294882348949504/2295055730212864/STEM/b9432ab561d7493f9339ccd614591ff8.png?resizew=160)
(1)请你写出y与x之间的函数关系式;
(2)根据你写出的函数关系式,求出当水集的宽度为1m时,余下的可耕地面积为多少;
(3)若可耕地面积为4408m2,求此时水渠的宽度.
![](https://img.xkw.com/dksih/QBM/2019/9/20/2294882348949504/2295055730212864/STEM/b9432ab561d7493f9339ccd614591ff8.png?resizew=160)
(1)请你写出y与x之间的函数关系式;
(2)根据你写出的函数关系式,求出当水集的宽度为1m时,余下的可耕地面积为多少;
(3)若可耕地面积为4408m2,求此时水渠的宽度.
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【推荐1】已知:抛物线y=﹣x2+2(m﹣1)x+m+1
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416132960256/STEM/6a23492784b34ceeb2d8d0c0b451d2f6.png?resizew=245)
(1)当m=﹣1时,求抛物线与x轴的交点坐标.
(2)设该抛物线与x轴交于A(x1,0)、B(x2,0),x1<0<x2,与y轴交于点C,若线段AO,BO,CO的长度满足
,请解决下列问题:
①求这个抛物线的解析式.
②作直线y=kx+b交①中的抛物线于点P和点Q,交y轴于点D,请问是否存在直线y=kx+b,使△CDP的面积和△CDQ的面积相等?若存在,求出k和b要满足的条件.若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416132960256/STEM/6a23492784b34ceeb2d8d0c0b451d2f6.png?resizew=245)
(1)当m=﹣1时,求抛物线与x轴的交点坐标.
(2)设该抛物线与x轴交于A(x1,0)、B(x2,0),x1<0<x2,与y轴交于点C,若线段AO,BO,CO的长度满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a370f600c420b9e9d4ad33b6c7494ab1.png)
①求这个抛物线的解析式.
②作直线y=kx+b交①中的抛物线于点P和点Q,交y轴于点D,请问是否存在直线y=kx+b,使△CDP的面积和△CDQ的面积相等?若存在,求出k和b要满足的条件.若不存在,请说明理由.
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【推荐2】综合与探究
如图,抛物线
与
轴交于
,
,与
轴交于点
.作直线
,
是抛物线上的一个动点.
的函数表达式.
(2)当点P在直线
下方时,连接
,
,
.当
时,求点P的坐标.
(3)在抛物线的对称轴上是否存在点
,使以
,
,
,
为顶点的四边形是平行四边形?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/2a9553fb9beb9ed49ea5f7a0f077884d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd99c5000629d7f49499d666e68f40d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7291b3d921f595f28960abcdce6dfbed.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://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)当点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f4baf7257ca8471f8dbb08dcb118901.png)
(3)在抛物线的对称轴上是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/acc290b44635265137fdf13146b6a6d9.png)
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【推荐1】如图,在平面直角坐标系中,点A的坐标为(12,−8),点B、C在x轴上,tan∠ABC=
,AB=AC,AH⊥BC于H,D为AC的中点,BD交AH于点M.
![](https://img.xkw.com/dksih/QBM/2015/5/14/1573839261073408/1573839267495936/STEM/525066dd0e83483aafdf846af757cf72.png)
(1)求过B、C、D三点的抛物线的解析式,并求出抛物线顶点E的坐标;
(2)过点E且平行于AB的直线l交y轴于点G,若将(2)中的抛物线沿直线l平移,平移后的抛物线交y轴于点F,顶点为E′(点E′在y轴右侧).是否存在这样的抛物线,使△E′FG为等腰三角形?若存在,请求出此时顶点E’的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2015/5/14/1573839261073408/1573839267495936/STEM/adc25c93a74e43ad9f2996c69ac9d337.png)
![](https://img.xkw.com/dksih/QBM/2015/5/14/1573839261073408/1573839267495936/STEM/525066dd0e83483aafdf846af757cf72.png)
(1)求过B、C、D三点的抛物线的解析式,并求出抛物线顶点E的坐标;
(2)过点E且平行于AB的直线l交y轴于点G,若将(2)中的抛物线沿直线l平移,平移后的抛物线交y轴于点F,顶点为E′(点E′在y轴右侧).是否存在这样的抛物线,使△E′FG为等腰三角形?若存在,请求出此时顶点E’的坐标;若不存在,请说明理由.
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【推荐2】如图抛物线
经过直线
的坐标轴的两个交点A,B,此抛物线与x轴的另一个交点为C.
(1)求此抛物线的解析式,并写出顶点D的坐标:
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235d7dd12f948f5ffb2e5afddc95612.png)
(1)求此抛物线的解析式,并写出顶点D的坐标:
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2020/12/5/2607222227877888/2610341783519232/STEM/436844aa-70db-484e-8ed8-e17118dc4bfe.png)
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