如图,抛物线
与
轴交于
,
两点,与
轴交于点
.
(1)求抛物线的解析式;
(2)结合图象求出当
时,
的取值范围;
(3)已知点
在抛物线的对称轴上,是否存在点
,使
最小,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/22106baba401cfaef881253e49c3c777.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/91fc70dfc020212a962eb3b228e7b599.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/2023/10/23/53e9b746-7cc4-4ce0-8f82-ba087ef1ee3f.png?resizew=136)
(1)求抛物线的解析式;
(2)结合图象求出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1cbe05135aa82bd9ce0f4885cf73bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)已知点
![](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/083f202745ff44c70d85feac528bba55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
更新时间:2023-10-21 06:59:54
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【推荐1】如图,某大学的校门是一抛物线形的水泥建筑物,大门的宽度为8米,两侧距地面4米高处各挂有一个挂校名横匾用的铁环,两铁环的水平距离为6米,则校门的高度是多少?(精确到0.1)
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【推荐2】已知直线
的解析式为
和点
.
(1)求证:无论
为何值,直线
必定经过一点,并求该点的坐标;
(2)设直线必定经过的点为
.
①若直线
经过点A,且点A所在的函数图象经过与点
关于原点对称的点,求
的取值范围;
②当
时,设
轴时, A点位置为
,A,
,
三点共线时, A点位置为
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47460bfa9afca6625f8f9696901b2392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b08bca218ebd15034b8bde0f700a85.png)
(1)求证:无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设直线必定经过的点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24624dffd30b66a5e4de57362b32b2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50afa1c347f3ba8a299e6087c421a162.png)
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【推荐1】已知抛物线
上有一点M(x0,
)位于
轴下方.
(1)求证:此抛物线与x轴交于两点;
(2)设此抛物线与
轴的交点为A(
,0),B(
,0),且
<
,求证:
<
<
.
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573697952137216/1573697958363136/STEM/0e22fe3b663040d4b3127b95dd3f2315.png)
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573697952137216/1573697958363136/STEM/8b25c2d18023490197f15b732732f444.png)
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573697952137216/1573697958363136/STEM/02422b5af3a74382b545dfd71dcb5aed.png)
(1)求证:此抛物线与x轴交于两点;
(2)设此抛物线与
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573697952137216/1573697958363136/STEM/02422b5af3a74382b545dfd71dcb5aed.png)
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573697952137216/1573697958363136/STEM/a7e8765082934eaba799c90d49650db7.png)
![](https://img.xkw.com/dksih/QBM/2014/1/13/1573697952137216/1573697958363136/STEM/790ceedee74e4c3fbd333f4687dfb355.png)
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![](https://img.xkw.com/dksih/QBM/2014/1/13/1573697952137216/1573697958363136/STEM/790ceedee74e4c3fbd333f4687dfb355.png)
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【推荐2】如图,抛物线的顶点坐标为
,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/6234961b-d2a1-4a1a-ae84-6f85945a2278.png?resizew=259)
(1)求抛物线的解析式;
(2)求点
、
的坐标及线段
的长;
(3)求
的外接圆
的半径;
(4)若(3)中的
交抛物线的对称轴于
、
两点(点
在点
的上方),在对称轴右边的抛物线上有一动点
,连接
、
、
,线段
交弦
于点
.若
把图形
(指圆弧
和线段
、
组成的图形)分成两部分,当这两部分面积之差等于4时,求出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20feb7bb2bf1bd381dc2b3f7b5d2abda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f6dd0159f0fe46dbc3f4e493f8d3e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/6234961b-d2a1-4a1a-ae84-6f85945a2278.png?resizew=259)
(1)求抛物线的解析式;
(2)求点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c72c070f4f4d2b44927391b59a1e755.png)
(4)若(3)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c72c070f4f4d2b44927391b59a1e755.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐1】如图,在平面直角坐标系中,已知一次函数
的图象与
轴,
轴分别交于
两点,以
为边在第二象限内作正方形
.
(1)求正方形
的面积;
(2)求点
和点
的坐标;
(3)在
轴上是否存在点
,使
的周长最小?若存在,请求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373e940578737a54a51be72e53a31c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/3/32f538a3-c98f-4005-b273-32966577184b.png?resizew=192)
(1)求正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9482a624e40d1a6474d4c1c240e4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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名校
【推荐2】如图,在矩形中
,
,点D是边
的中点,反比例函数
的图像经过点D,交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/f834ad33-c947-439d-8d4e-a91b3a31930a.png?resizew=193)
(1)求k的值及直线
的解析式;
(2)在x轴上找一点P,使
的周长最小,求此时点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582588d8ea55b2d60cac195e26b410c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9fd892406bd7994f67805e1fe6d7b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/f834ad33-c947-439d-8d4e-a91b3a31930a.png?resizew=193)
(1)求k的值及直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)在x轴上找一点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
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