如图,抛物线
经过点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/1b311b3e-e655-4d37-bf3d-901a9f687ad6.png?resizew=155)
(1)求抛物线的解析式;
(2)点
在抛物线上,P为直线
下方抛物线上的点,当
的面积最大时,求出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/1b311b3e-e655-4d37-bf3d-901a9f687ad6.png?resizew=155)
(1)求抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6ab68783bd82cfc2e36af15e3af00f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099dd87a526391f830ac2a11e7d7ad56.png)
更新时间:2023-01-16 11:15:07
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【推荐1】在平面直角坐标系xOy中,已知点M(a,b).如果存在点N(a′,b′),满足a′=|a+b|,b′=|a﹣b|,则称点N为点M的“控变点”.
(1)点A(﹣1,2)的“控变点”B的坐标为 ;
(2)已知点C(m,﹣1)的“控变点”D的坐标为(4,n),求m,n的值;
(3)长方形EFGH的顶点坐标分别为(1,1),(5,1),(5,4),(1,4).如果点P(x,﹣2x)的“控变点”Q在长方形EFGH的内部,直接写出x的取值范围.
(1)点A(﹣1,2)的“控变点”B的坐标为 ;
(2)已知点C(m,﹣1)的“控变点”D的坐标为(4,n),求m,n的值;
(3)长方形EFGH的顶点坐标分别为(1,1),(5,1),(5,4),(1,4).如果点P(x,﹣2x)的“控变点”Q在长方形EFGH的内部,直接写出x的取值范围.
![](https://img.xkw.com/dksih/QBM/2021/7/9/2760296366424064/2762107995242496/STEM/a76670f8-729d-4793-9b89-f2bafaacb91a.png)
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【推荐2】如图所示,A(1,0)、点B在y轴上,将三角形OAB沿x轴负方向平移,平移后的图形为三角形DEC,且点C的坐标为(-3,2).
(1)直接写出点E的坐标 ;D的坐标
(3)点P是线段CE上一动点,设∠CBP=x°,∠PAD=y°,∠BPA=z°,确定x, y,z之间的数量关系,并证明你的结论.
(1)直接写出点E的坐标 ;D的坐标
(3)点P是线段CE上一动点,设∠CBP=x°,∠PAD=y°,∠BPA=z°,确定x, y,z之间的数量关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2020/2/15/2399752034525184/2400306398814208/STEM/10a29b07-1377-4824-98bc-9db7539f3b56.png?resizew=173)
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【推荐1】如图,抛物线y=ax2+bx+3(a≠0)与x轴交于点A(﹣1,0),点B(3,0),与y轴交于点C,对称轴与x轴交于点D,点P是直线BC上方抛物线上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/2ad381d5-f35b-4bf5-9b2e-7faae0252345.png?resizew=311)
(1)求抛物线的解析式;
(2)在直线BC上方的抛物线上找一点P,作PG⊥BC,求线段PG的最大值;
(3)连接CD、CB,当∠PCB=∠DCB时,求点P的坐标;
(4)若点M为直线BC上一点,N为平面内一点,是否存在这样的点M和点N使得以C、D、M、N为顶点的四边形是菱形?若存在,直接写出点M坐标;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/17/2ad381d5-f35b-4bf5-9b2e-7faae0252345.png?resizew=311)
(1)求抛物线的解析式;
(2)在直线BC上方的抛物线上找一点P,作PG⊥BC,求线段PG的最大值;
(3)连接CD、CB,当∠PCB=∠DCB时,求点P的坐标;
(4)若点M为直线BC上一点,N为平面内一点,是否存在这样的点M和点N使得以C、D、M、N为顶点的四边形是菱形?若存在,直接写出点M坐标;若不存在,说明理由.
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【推荐2】如图,在平面直角坐标系中,直线
与
轴、
轴分别交于点
、
,直线
与
轴、
轴分别交于点
、
,与直线
交于点
,点
在直线
上,过点
作
轴,交直线
于点
.点
、点
恰好关于点
对称.
的解析式;
(2)求
的面积;
(3)如果线段
的长为
,求点
的坐标;
(4)我们规定:横坐标和纵坐标都是整数的点叫整点.如果
,直接写出所有符合条件的整点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf2101c144a67a4684edec4c847cf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561962723c3173c2389830d6ba9865bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddb32a7a5c157fdf8aa049b2d665b4c.png)
(3)如果线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0874f019492261eb175bdcc08c189d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(4)我们规定:横坐标和纵坐标都是整数的点叫整点.如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f021681c1a4fb408050d1199c4903829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图,平面直角坐标系中,抛物线
与
轴交于
、
两点(
在
的左侧),与
轴交于点
,连接
、
,抛物线的顶点为
.
(2)当四边形
的面积21时,求该函数解析式;
(3)当
为直角三角形时,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea77932f249517028e703a16ad9a2da.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)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
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【推荐2】如图,抛物线y=ax2+bx+c(a≠0)的顶点坐标为(2,﹣1),图象与y轴交于点C(0,3),与x轴交于A、B两点.
![](https://img.xkw.com/dksih/QBM/2020/1/7/2371750038257664/2372055783096320/STEM/5f196eca1a5541fea8c3ee76388dd281.png?resizew=182)
(1)求抛物线的解析式;
(2)设抛物线对称轴与直线BC交于点D,连接AC、AD,点E为直线BC上的任意一点,过点E作x轴的垂线与抛物线交于点F,问是否存在点E使△DEF为直角三角形?若存在,求出点E坐标,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2020/1/7/2371750038257664/2372055783096320/STEM/5f196eca1a5541fea8c3ee76388dd281.png?resizew=182)
(1)求抛物线的解析式;
(2)设抛物线对称轴与直线BC交于点D,连接AC、AD,点E为直线BC上的任意一点,过点E作x轴的垂线与抛物线交于点F,问是否存在点E使△DEF为直角三角形?若存在,求出点E坐标,若不存在,请说明理由.
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【推荐1】综合与探究:如图,已知点
,
,经过B、C两点的抛物线
与x轴的另一个交点为A.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/04c8bb66-acef-4d49-aa75-506505831dc3.png?resizew=177)
(1)求抛物线的解析式;
(2)点D在抛物线的对称轴上,当
的周长最小时,求点D的坐标;
(3)已知点E在第四象限的抛物线上,过点E作
轴交线段
于点F,连结
,若点
,请直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8794fdd5b979fa369ac350d063f631d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/04c8bb66-acef-4d49-aa75-506505831dc3.png?resizew=177)
(1)求抛物线的解析式;
(2)点D在抛物线的对称轴上,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)已知点E在第四象限的抛物线上,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627026bcc48e88384717f3d2fea54582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】如图,在平面直角坐标系中,已知二次函数
图象经过
两点.
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720191862669312/2736446596096000/STEM/d8e03f28-2fce-4e62-b47c-f805089c0ff4.png)
(1)求b,c的值.
(2)连结
,
,若P是第一象限内抛物线上一点,直线
把
的面积分成相等的两部分.
①求直线
的解析式.
②将该抛物线沿着射线
的方向平移m个单位,使其顶点落在
的内部(不包括边界),求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a760736669e5fdf80800fbce8b733cf.png)
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720191862669312/2736446596096000/STEM/d8e03f28-2fce-4e62-b47c-f805089c0ff4.png)
(1)求b,c的值.
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
①求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
②将该抛物线沿着射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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