我们不妨约定:在平面直角坐标系中,若某直线
经过抛物线
(
,
,
是常数,
)的顶点和该抛物线与
轴的交点,则把该直线
称为抛物线
的“心心相融线”.根据该约定,请完成下列各题:
(1)若直线
是抛物线
的“心心相融线”,求
的值.
(2)若过原点的抛物线
(
,
是常数,且
)的“心心相融线”为
,则代数式
是否为定值?若是,请求出该定值;若不是,请说明理由.
(3)当常数
满足
时,求抛物线
(
,
,
是常数,
)的“心心相融线”
与
轴,
轴所围成的三角形面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04be2c79a792c5f15de83506382d192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5109eb35b9c16fc5e128198a1819a44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若过原点的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43091dee99247e22161194ddb2222d29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dd116a0c9e6820b98b2b368a65f687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a0459712f22cf44da9c436ed61f2e5.png)
(3)当常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b2b3201592004941e42a4d3b4e117f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93883a2b6acbbac751522ebb9df93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](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/d053b14c8588eee2acbbe44fc37a6886.png)
更新时间:2023-10-18 20:37:36
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【推荐1】在平面直角坐标系中,点O为坐标原点,直线
交x轴于点A,交y轴于点B,直线
交x轴于点C,交y轴于点D,两直线交于点E,
,
.
(2)如图2,点P在x轴上,过点P作x轴的垂线交射线
于点M,交射线
于点N,设点P的横坐标为t,线段
的长为d,求d与t之间的函数关系式,直接写出t的取值范围;
(3)如图3,在(2)的条件下,
,点H在直线
上,点F在x轴上,点G在直线
上,连接
和
, 当四边形
为矩形,且
时,求点G的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c4f39399ec245a67db2933ed639f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36bba287ee8a7017b80007573d8105ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a975578a646b192ebe243c833ff54ec3.png)
(2)如图2,点P在x轴上,过点P作x轴的垂线交射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)如图3,在(2)的条件下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5748495a9d6a364f488e288a4d2bf5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5afa2df59cf4bb0fab4a8dedab256fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff993dd4436592fd8694f8459760d4a3.png)
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【推荐2】如图,已知直线
与反比例函数
(
,
)的图象分别交于点A和点B,与
轴交于点C,与
轴交于点D;
(1)如图1,当点A坐标为
时,求直线
的解析式和反比例函数关系式;
(2)将
沿射线
方向平移得到
,若点O,B的对应点
,
同时落在函数
上,
①求n的值;
②平移过程中
扫过的面积是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96e6a5a288927eb8580cb119f2a2abe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/25/e18376b2-c938-4024-b664-4af8c66c85e6.png?resizew=483)
(1)如图1,当点A坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558548416083802d872d9354214aff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0d02d76af11a2b8bfb7d6e1b3c171f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bde98b608331387ffbfaab1845cb662.png)
①求n的值;
②平移过程中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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【推荐1】对于⊙C和⊙C上的一点A,若平面内的点P满足:射线AP与⊙C交于点Q(点Q可以与点P重合),且1≤
≤2,则点P称为点A关于⊙C的“生长点”.已知点O为坐标原点,⊙O的半径为1,点A(﹣1,0).
(1)若点P是点A关于⊙O的“生长点”,且点P在x轴上,请写出一个符合条件的点P的坐标_______;
(2)若点B是点A关于⊙O的“生长点”,且满足∠BAO=30°,求点B的纵坐标t的取值范围;
(3)直线y=
x+b与x轴交于点M,且与y轴交于点N,若线段MN上存在点A关于⊙O的“生长点”,直接写出b的取值范围是_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56f4336f52383580123d2a0e5f360ec.png)
(1)若点P是点A关于⊙O的“生长点”,且点P在x轴上,请写出一个符合条件的点P的坐标_______;
(2)若点B是点A关于⊙O的“生长点”,且满足∠BAO=30°,求点B的纵坐标t的取值范围;
(3)直线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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【推荐2】将直角坐标系中一次函数的图像与坐标轴围成的三角形,叫做此一次函数的坐标三角形(也称为直线的坐标三角形).如图,一次函数y=kx-7的图像与x、y轴分别交于点A、B,那么
为此一次函数的坐标三角形(也称为直线AB的坐标三角形).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/e4b49369-2f21-4629-b77f-e72ede480a5a.png?resizew=171)
(1)如果点C在x轴上,将
沿着直线AB翻折,使点C落在点
上,求直线BC的坐标三角形的面积;
(2)如果一次函数y=kx-7的坐标三角形的周长是21,求k值;
(3)在(1)(2)条件下,如果点E的坐标是
,直线AB上有一点P,使得
周长最小,求此时△PBC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/21/e4b49369-2f21-4629-b77f-e72ede480a5a.png?resizew=171)
(1)如果点C在x轴上,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76928682d06b0e79c05c024c0dc9e3d6.png)
(2)如果一次函数y=kx-7的坐标三角形的周长是21,求k值;
(3)在(1)(2)条件下,如果点E的坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d9ee0ee7f51cfe25a00eda7b361372c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
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【推荐1】小贤与小杰在探究某类二次函数问题时,经历了如下过程:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/12483231-c458-4952-b3fc-f4e395f11fd9.png?resizew=241)
求解体验:
(1)已知抛物线
经过点
,则b= ,顶点坐标为 ,该抛物线关于点
成中心对称的抛物线表达式是 .
抽象感悟:
我们定义:对于抛物线
,以y轴上的点
为中心,作该抛物线关于点M对称的抛物线,则我们又称抛物线为抛物线y的“衍生抛物线”,点M为“衍生中心”.
(2)已知抛物线
关于点
的衍生抛物线为
,若这两条抛物线有交点,求m的取值范围.
问题解决:
(3)已知抛物线
.
①若抛物线y的衍生抛物线为
,两抛物线有两个交点,且恰好是它们的顶点,求a,b的值及衍生中心的坐标;
②若抛物线y关于点
的衍生抛物线为
,其顶点为
;关于点
的衍生抛物线为
,其顶点为
;…;关于点
的衍生抛物线为
,其顶点为
,…(
为正整数).求
的长(用含n的式子表示).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/12483231-c458-4952-b3fc-f4e395f11fd9.png?resizew=241)
求解体验:
(1)已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb2aedb74c5dc5f08b51449140a198b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
抽象感悟:
我们定义:对于抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8352b2e643a7ce605334f1b0e572bfb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dba6ef0c00b3442464e6d0f39cf5c1.png)
(2)已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf8e0b782da0851f388fa0ebcdfe62f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2832f82fdeafa819c92ca5c1e74eb5ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
问题解决:
(3)已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59da20b5a3fdc27b2bbdd3b237c76c0.png)
①若抛物线y的衍生抛物线为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec982a66ab526da83f35f24054c69c1.png)
②若抛物线y关于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d49d8ae3c3bb4becdda327cf7e79eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84744a932f6dec312f49be766ab88993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3add1af3d75220f36e733b554bad5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a79b9eaa5e7ab7a1e5c512b571914dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d159513efe8dc11305ff2fc3942110a.png)
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【推荐2】已知二次函数的解析式为
.
(1)求该二次函数的顶点坐标(用含k的式子表示);
(2)若已知
,
,该二次函数的图象和线段
有两个交点,结合函数图象,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3e8557cd3c4cdb69adb1afa3fa7d87.png)
(1)求该二次函数的顶点坐标(用含k的式子表示);
(2)若已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc9aa334c8a364cbc597127d60b2b51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】在如图所示的平面直角坐标系中,抛物线
与x轴的交点为A、B.与y轴的交点为C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/d34894ad-1705-4925-ab7b-eaf2a5ffa662.png?resizew=350)
(1)请你求出点A、B、C的坐标并直接写出直线
的关系式;
(2)若点F是直线
上方抛物线上的任意一点,连接
、
,请你求出
面积的最大值;
(3)点D在该抛物线的对称轴上,点E是平面直角坐标系内的任意一点,以点B、C、D、E为顶点的四边形是矩形,则点E的坐标是__________(请直接写出答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8df47b4b59a209666cc3587478f77e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/d34894ad-1705-4925-ab7b-eaf2a5ffa662.png?resizew=350)
(1)请你求出点A、B、C的坐标并直接写出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)若点F是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a0c85deb80d8e63bc60127e803f7ea.png)
(3)点D在该抛物线的对称轴上,点E是平面直角坐标系内的任意一点,以点B、C、D、E为顶点的四边形是矩形,则点E的坐标是__________(请直接写出答案)
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【推荐2】(14分)如图,在平面直角坐标系中,矩形OCDE的三个顶点分别是C(3,0),D(3,4),E(0,4).点A在DE上,以A为顶点的抛物线过点C,且对称轴x=1交x轴于点B.连接EC,AC.点P,Q为动点,设运动时间为t秒.
(1)填空:点A坐标为 ;抛物线的解析式为 .
(2)在图①中,若点P在线段OC上从点O向点C以1个单位/秒的速度运动,同时,点Q在线段CE上从点C向点E以2个单位/秒的速度运动,当一个点到达终点时,另一个点随之停止运动.当t为何值时,△PCQ为直角三角形?
(3)在图②中,若点P在对称轴上从点A开始向点B以1个单位/秒的速度运动,过点P作PF⊥AB,交AC于点F,过点F作FG⊥AD于点G,交抛物线于点Q,连接AQ,CQ.当t为何值时,△ACQ的面积最大?最大值是多少?
(1)填空:点A坐标为 ;抛物线的解析式为 .
(2)在图①中,若点P在线段OC上从点O向点C以1个单位/秒的速度运动,同时,点Q在线段CE上从点C向点E以2个单位/秒的速度运动,当一个点到达终点时,另一个点随之停止运动.当t为何值时,△PCQ为直角三角形?
(3)在图②中,若点P在对称轴上从点A开始向点B以1个单位/秒的速度运动,过点P作PF⊥AB,交AC于点F,过点F作FG⊥AD于点G,交抛物线于点Q,连接AQ,CQ.当t为何值时,△ACQ的面积最大?最大值是多少?
![](https://img.xkw.com/dksih/QBM/2018/1/4/1852704668516352/1856553094529024/STEM/dfee92e551e6497c9f764913f565d072.png?resizew=461)
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