综合与探究
如图1,将抛物线
先向左平移
个单位长度,再向下平移若干个单位长度,得到抛物线
与
轴交于点
.
的函数表达式.
(2)如图2,点
在
轴上,
,过点
作
轴的垂线分别与
交于点M,N,若
,求点
的横坐标
.
(3)如图3,抛物线
与
轴交于
,
两点(点
在点
的右侧),点
在抛物线
上,且位于第三象限,连接
,交
于点
,记
的面积为
,
的面积为
,求
的最大值.
如图1,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f845acf64f364d222f43a1f0ec41a1bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/163db037fa0e19bba64ad153a029b9da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d6e498b0c1d1cedb86fe548f9fe79a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8885ec539bee393d1dec8c072b8174cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aeae227ddcd963101c96448b12a69d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b483f01a9d3b745d8e07000cbbe89011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图3,抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.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://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.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/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
更新时间:2024-05-08 19:29:06
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相似题推荐
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【推荐1】如图,已知抛物线
与一直线相交于
,
两点,与y轴交于点N,其顶点为D.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/9102ee67-2133-418a-92b2-6ce49e0a4069.png?resizew=320)
(1)求抛物线及直线
的函数关系式;
(2)若P是抛物线上位于直线
上方的一个动点,设点P的横坐标为t;
①当
时,求点P的坐标;
②是否存在点P,使得
是以
为斜边的直角三角形?若存在,求点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b8c639c851e0044ee22020324c5570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33210953efdd659ebd35e82135317076.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/9102ee67-2133-418a-92b2-6ce49e0a4069.png?resizew=320)
(1)求抛物线及直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)若P是抛物线上位于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdfa33c32e5f789aa43f34036db71f0.png)
②是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解题方法
【推荐2】如图,抛物线y=ax2+bx﹣4与x轴交于A(﹣2,0)、B(8,0)两点,与y轴交于点C,连接BC,以BC为一边,点O为对称中心作菱形BDEC,点P是x轴上的一个动点,设点P的坐标为(m,0),过点P作x轴的垂线l交抛物线于点Q.
(1)求抛物线的解析式;
(2)当点P在线段OB上运动时,直线l分别交BD、BC于点M、N,试探究m为何值时,四边形CQMD是平行四边形,此时,请判断四边形CQBM的形状,并说明理由.
(1)求抛物线的解析式;
(2)当点P在线段OB上运动时,直线l分别交BD、BC于点M、N,试探究m为何值时,四边形CQMD是平行四边形,此时,请判断四边形CQBM的形状,并说明理由.
![](https://img.xkw.com/dksih/QBM/2020/3/24/2433554256986112/2433802735730688/STEM/b235b7df01ca4fda835d8749666beae5.png?resizew=222)
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【推荐3】如图,抛物线
(a≠0)与x轴、y轴分别交于点A,B,C三点,已知点A(﹣2,0),点C(0,﹣8),点D是抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/0b9d4265-f007-421b-9102-ea4f03569902.png?resizew=399)
(1)求抛物线的解析式及顶点D的坐标;
(2)如图1,抛物线的对称轴与x轴交于点E,第四象限的抛物线上有一点P,将△EBP沿直线EP折叠,使点B的对应点
落在抛物线的对称轴上,求点P的坐标;
(3)如图2,设BC交抛物线的对称轴于点F,作直线CD,点M是直线CD上的动点,点N是平面内一点,当以点B,F,M,N为顶点的四边形是菱形时,请直接写出点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc229acc8bf1a2047394bda863b1ea71.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/0b9d4265-f007-421b-9102-ea4f03569902.png?resizew=399)
(1)求抛物线的解析式及顶点D的坐标;
(2)如图1,抛物线的对称轴与x轴交于点E,第四象限的抛物线上有一点P,将△EBP沿直线EP折叠,使点B的对应点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(3)如图2,设BC交抛物线的对称轴于点F,作直线CD,点M是直线CD上的动点,点N是平面内一点,当以点B,F,M,N为顶点的四边形是菱形时,请直接写出点M的坐标.
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【推荐1】在平面直角坐标系xOy中(如图).已知抛物线
经过点A(﹣1,0)和点B(0,
),顶点为C,点D在其对称轴上且位于点C下方,将线段DC绕点D按顺时针方向旋转90°,点C落在抛物线上的点P处.
(1)求这条抛物线的表达式;
(2)求线段CD的长;
(3)将抛物线平移,使其顶点C移到原点O的位置,这时点P落在点E的位置,如果点M在y轴上,且以O、D、E、M为顶点的四边形面积为8,求点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b461b70f30d3ff4345b871f8674692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
(1)求这条抛物线的表达式;
(2)求线段CD的长;
(3)将抛物线平移,使其顶点C移到原点O的位置,这时点P落在点E的位置,如果点M在y轴上,且以O、D、E、M为顶点的四边形面积为8,求点M的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/0a37032f-1979-4c3f-bd91-e67b47f7361a.png?resizew=173)
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【推荐2】已知抛物线y=x2﹣4x+1,将此抛物线沿x轴方向向左平移4个单位长度,得到一条新的抛物线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/0652b547-ab1f-449c-bee0-cbaad121cc1c.png?resizew=219)
(1)求平移后的抛物线解析式;
(2)若直线y=m与这两条抛物线有且只有四个交点,求实数m的取值范围;
(3)若将已知的抛物线解析式改为y=ax2+bx+c(a>0,b<0),并将此抛物线沿x轴方向向左平移
个单位长度,试探索问题(2).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/7/0652b547-ab1f-449c-bee0-cbaad121cc1c.png?resizew=219)
(1)求平移后的抛物线解析式;
(2)若直线y=m与这两条抛物线有且只有四个交点,求实数m的取值范围;
(3)若将已知的抛物线解析式改为y=ax2+bx+c(a>0,b<0),并将此抛物线沿x轴方向向左平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4959731b39859941d702e680b554b707.png)
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【推荐1】抛物线
与
轴交于
、
两点.与
轴交于点
、点
在抛物线上.
(1)求抛物线的解析式.
(2)如图,连接
、
,点
在对称轴左侧的抛物线上,若
,求点
的坐标.
(3)如图,过点A的直线
,点
是直线
上方抛物线上一动点,过点
作
,垂足为点
,连接
,
,
,
.当四边形
的面积最大时,求点
的坐标及四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.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/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a8e667c8ba7ea1de96ccadd06f86a8.png)
(1)求抛物线的解析式.
(2)如图,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a458aa4e438a9b1e6cd54827c30ce76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/16/c3e416fb-4f9b-41d3-b91d-62a237d8992a.png?resizew=149)
(3)如图,过点A的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09349ae6dd5f9793717c7e90c8777ce9.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db125810c1c256723759cb37466bbd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2a0f7881325309b38ce4793f63a5c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2a0f7881325309b38ce4793f63a5c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/17/db2a82ca-a433-4cfe-a05c-ece26e6f5f9e.png?resizew=220)
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【推荐2】某农作物的生长率P与温度t
有如下关系:如图1,当
时可近似用函数
刻画,当
时可近似用函数
刻画.
(1)求h的值.
(2)按照经验,该作物提前上市的天数m(天)与生长率P满足函数关系:
①请运用记学的知识,求m关于P的函数表达式;
②请用含t的代数式表示m;
(3)天气寒冷,大棚加温可改变农作物生长速度.在(2)的条件下,原计划大恒温
时,每天的成本为200元,该作物30天后上市时,根据市场调查:每提前一天上市售出(一次售完),销售额可增加600元.因此给大棚继续加温,加温后每天成本w(元)与大棚温度t
之间的关系如图2,提前上市增加的利润和节省的成本为M,问当
时,提前上市多少天时M最大?并求此时M最大值(农作物上市售出后大棚暂停使用).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a19221957d802f63eefe4562d1c52b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90ff024a7e029636821a1b0490e7526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c718e8e1a0f109932f553616af3004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98f968b0f016cf2d82c9d0c1486bbd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477fb9fc6eb5b9ad675bd009da60310d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/9b808a86-1d5f-45c4-86ff-6e034402e503.png?resizew=404)
(1)求h的值.
(2)按照经验,该作物提前上市的天数m(天)与生长率P满足函数关系:
生长率P | 0.2 | 0.3 | 0.4 | 0.5 |
提前上市的天数m(天) | 0 | 5 | 10 | 15 |
②请用含t的代数式表示m;
(3)天气寒冷,大棚加温可改变农作物生长速度.在(2)的条件下,原计划大恒温
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8686975dd5327f7db255156a3eaa52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a19221957d802f63eefe4562d1c52b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c22b0f4341af8e8d49ddc16242bb99a0.png)
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【推荐1】(1)探究新知:
①如图,已知AD//BC,AD=BC,点M,N是直线CD上任意两点.
![](https://img.xkw.com/dksih/QBM/2010/12/17/1574131475668992/1574131572981760/STEM/f04e63ed-4b79-4443-82d2-06cb6d1bbcdd.png?resizew=242)
求证:△ABM与△ABN的面积相等.
②如图,已知AD//BE,AD=BE,AB//CD//EF,点M是直线CD上任一点,点G是直线EF上任一点.试判断△ABM与△ABG的面积是否相等,并说明理由.
![](https://img.xkw.com/dksih/QBM/2010/12/17/1574131475668992/1574131572981760/STEM/b50769a5-0fa0-4d29-8932-a59ba7413b4f.png?resizew=227)
(2)结论应用:
如图③,抛物线y=ax2+bx+c的顶点为C(1,4),交x轴于点A(3,0),交y轴于点D.试探究在抛物线y=ax2+bx+c上是否存在除点C以外的点E,使得△ADE与△ACD的面积相等? 若存在,请求出此时点E的坐标,若不存在,请说明理由.
﹙友情提示:解答本问题过程中,可以直接使用“探究新知”中的结论.﹚
①如图,已知AD//BC,AD=BC,点M,N是直线CD上任意两点.
![](https://img.xkw.com/dksih/QBM/2010/12/17/1574131475668992/1574131572981760/STEM/f04e63ed-4b79-4443-82d2-06cb6d1bbcdd.png?resizew=242)
求证:△ABM与△ABN的面积相等.
②如图,已知AD//BE,AD=BE,AB//CD//EF,点M是直线CD上任一点,点G是直线EF上任一点.试判断△ABM与△ABG的面积是否相等,并说明理由.
![](https://img.xkw.com/dksih/QBM/2010/12/17/1574131475668992/1574131572981760/STEM/b50769a5-0fa0-4d29-8932-a59ba7413b4f.png?resizew=227)
(2)结论应用:
如图③,抛物线y=ax2+bx+c的顶点为C(1,4),交x轴于点A(3,0),交y轴于点D.试探究在抛物线y=ax2+bx+c上是否存在除点C以外的点E,使得△ADE与△ACD的面积相等? 若存在,请求出此时点E的坐标,若不存在,请说明理由.
﹙友情提示:解答本问题过程中,可以直接使用“探究新知”中的结论.﹚
![](https://img.xkw.com/dksih/QBM/2010/12/17/1574131475668992/1574131572981760/STEM/7495c83b-97f3-44d9-85a7-70e1c84b735e.png?resizew=201)
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【推荐2】如图,在平面直角坐标系中,直线y=x+1与抛物线y=ax2+bx﹣3交于A、B点,点A在x轴上,点B的纵坐标为5.点P是直线AB下方的抛物线上一动点(不与点A,B重合).过点P作x轴的垂线交直线AB于点C.作PD⊥AB于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/1770739b-db62-4ee4-8e57-8cba73cd5952.png?resizew=142)
(1)求抛物线的解析式;
(2)设点P的横坐标为m.
①用含m的代数式表示线段PD的长,并求出线段PD长的最大值;
②连接PB,线段PC把△PDB分成两个三角形,若这两个三角形的面积之比为2:3,求出m的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/1770739b-db62-4ee4-8e57-8cba73cd5952.png?resizew=142)
(1)求抛物线的解析式;
(2)设点P的横坐标为m.
①用含m的代数式表示线段PD的长,并求出线段PD长的最大值;
②连接PB,线段PC把△PDB分成两个三角形,若这两个三角形的面积之比为2:3,求出m的值.
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