将抛物线
:
平移,使其顶点为
,得到抛物线
,抛物线
交x轴的正半轴于A点,交y轴于C点.
(1)直接写出抛物线
的表达式;
(2)如图1,抛物线
的对称轴与直线
相交于点B,G为直线
上的点,过点G作
交抛物线
于点F,当以B,D,G,F为顶点的四边形为平行四边形时,求点G的横坐标;
(3)如图2,
的顶点M,N在抛物线
上,点M在点N右边,两条直线
,
与抛物线
均有唯一公共点,
,
均与y轴不平行.若
的面积为
,设M,N两点的横坐标分别为m,n,求m与n的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf2fa1e61446162d6db06ec48ed7a64f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/0e830f19-f297-4af4-9068-6d042e1e2911.png?resizew=244)
(1)直接写出抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)如图1,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d50dfb03884738594ef68c0b703a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d13e82ad6bdae51f30e2a3dafd630d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d13e82ad6bdae51f30e2a3dafd630d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
更新时间:2024-03-14 11:56:22
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,在平面直角坐标系中,
是坐标原点,菱形
的顶点
,
在
轴的负半轴,抛物线
过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/5d6ee6be-efe2-4e96-8618-3b62c781fdae.png?resizew=200)
(1)求
的值;
(2)若把抛物线
沿
轴向左平移
个单位长度,使得平移后的抛物线经过菱形
的顶点
.试判断点
是否落在平移后的抛物线上,并说明理由.
(3)在
轴上是否存在点
,使以
、
、
三点为顶点的三角形是直角三角形,若存在直接写出
点坐标,若不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c09b41032e4722c412c2e2427500a0.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/e4e04f876293847857139242437e18ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/5d6ee6be-efe2-4e96-8618-3b62c781fdae.png?resizew=200)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若把抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4e04f876293847857139242437e18ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐2】已知二次函数
.
(1)若
.
①当
时,求该函数图象的顶点坐标.
②不论
取何值,图象是否会经过定点?若会,请求出图象经过的定点坐标;若不会,请说明理由.
(2)点
,
在该函数图象上,且
.若
,图象的顶点在第三象限,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234e4e49286824aeec6ac9ccb08ebc35.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ec3d42cc0f2ce5aaf7682ded947a50.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
②不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2799abb64fd7bfce9dfa7228aa460564.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b335385838979e1744cb32542004c04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3316464faa4c460d8ea308c194667a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86b0da538701c08fb214608e062372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df7e635d8946dddfa3e677964f48f1d.png)
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解题方法
【推荐1】如图l所示,在直角梯形ABCD中,∠BAD=90°,E是直线AB上一点,过E作直线
∥BC,交直线CD于点F.将直线
向右平移,设平移距离BE为
,直角梯形ABCD被直线
扫过的面积(图中阴影部分)为S,S关于
的函数图象如图2所示,OM为线段,MN为抛物线的一部分,NQ为射线,N点横坐标为4.
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/51933ab8-3cd4-4fd7-a23e-9ebacf153aaa.png?resizew=488)
(1)AB=________;CD=__________;梯形ABCD的面积为_______(直接写出答案);
(2)当
时,求S关于
的函数关系式;
(3)当
为何值时,直线
将直角梯形ABCD分成的两部分面积之比为1:3.
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/21640eab854d427891dcf77daa9a271b.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/21640eab854d427891dcf77daa9a271b.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/738b486334274202abfe9c4a08a3b4e0.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/21640eab854d427891dcf77daa9a271b.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/485d23bd1728415a9fa99029762b4ae1.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/51933ab8-3cd4-4fd7-a23e-9ebacf153aaa.png?resizew=488)
(1)AB=________;CD=__________;梯形ABCD的面积为_______(直接写出答案);
(2)当
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/c2b315499dd54cc79dede0f5a3bca521.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/485d23bd1728415a9fa99029762b4ae1.png)
(3)当
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/485d23bd1728415a9fa99029762b4ae1.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573848128307200/1573848134696960/STEM/21640eab854d427891dcf77daa9a271b.png)
您最近一年使用:0次
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较难
(0.4)
【推荐2】如图,已知一次函数
与抛物线
都经过
轴上的
点和
轴上的
点.
(1)求抛物线的解析式;
(2)若抛物线的顶点为
,试求出点
的坐标和△
的面积;
(3)
是线段
上的一点,过点
作
轴,与抛物线交于
点,若直线
把△
分成的两部分面积之比为1∶3,请求出
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af50fdc907b86e9e933046d30cb7d10.png)
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求抛物线的解析式;
(2)若抛物线的顶点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52cbeb9b1c1d637b903cf3e5c7f730f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ebb01953c4ac7afb87497b9454579e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2021/1/14/2636168791957504/2638853725372416/STEM/e19ca9eaa61247de80bbf5f8ea203cda.png?resizew=204)
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(0.4)
【推荐1】如图,已知抛物线
与
轴交于点
,与
轴交于
、
两点(点
在点
左边).
(1)请直接写出
、
、
三点的坐标;
(2)点
是第一象限内抛物线上一点,求
面积最大时点
的坐标;
(3)如图
,已知点
在抛物线上,点
在
轴上,且四边形
为平行四边形,求
点的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/4/c8022bba-0746-4ed5-862f-617f2e772e1e.png?resizew=251)
(1)请直接写出
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ff841d876a4574ca1fce9433410e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐2】如图,已知抛物线
经过点
和点
,与
轴交于点
.
(1)求此抛物线的解析式;
(2)若点
是直线
下方的抛物线上一动点(不与点
,
重合),过点
作
轴的平行线交直线
于点
,设点
的横坐标为
.
①用含
的代数式表示线段
的长.
②连接
,
,求
的面积最大时点
的坐标.
(3)设抛物线的对称轴与
交于点
,点
是抛物线的对称轴上一点,
为
轴上一点,是否存在这样的点
和点
,使得以点
为顶点的四边形是菱形?如果存在,请直接写出点
的坐标;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16403fc9b29d6d8e814318ee24a9dc05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/bd1d0182-7f54-4c4e-a844-ae9db7bba482.png?resizew=167)
(1)求此抛物线的解析式;
(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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
①用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)设抛物线的对称轴与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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