如图,已知抛物线
分别交x轴y轴于点
,连接AC.
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958595551428608/2962421417320448/STEM/a650d0dd-4952-46e6-ab3a-9055dc2d0a80.png?resizew=226)
(1)求该抛物线的解析式.
(2)若
是抛物线上两点,当
时,均有
,求m的取值范围.
(3)将该抛物线向左平移
个单位长度后,得到的新抛物线与线段AC只有一个交点,请直接写出n的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c118980aa20f3631e36e1eb12597ae.png)
![](https://img.xkw.com/dksih/QBM/2022/4/15/2958595551428608/2962421417320448/STEM/a650d0dd-4952-46e6-ab3a-9055dc2d0a80.png?resizew=226)
(1)求该抛物线的解析式.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455bae796d928c3c4d9090e924259628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed32a58e8e3a9a9aa20e840a4e427247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86b0da538701c08fb214608e062372.png)
(3)将该抛物线向左平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b829d3ded5f93007d3ba22f2a862efe.png)
更新时间:2022-04-20 20:44:42
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【推荐1】已知:直线
交x轴于点A,交y轴于点B,点C为x轴上一点,AC=1,且OC<OA.抛物线
经过点A、B、C.
![](https://img.xkw.com/dksih/QBM/2013/5/21/1573654375727104/1573654382084096/STEM/11cb889f67654b93ad6d88e58e32bfd6.png?resizew=219)
(1)求该抛物线的表达式;
(2)点D的坐标为(-3,0),点P为线段AB上一点,当锐角∠PDO的正切值为
时,求点P的坐标;
(3)在(2)的条件下,该抛物线上的一点E在x轴下方,当△ADE的面积等于四边形APCE的面积时,求点E的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de869ae6b6dc5b79fcae3de540b30bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a27b5eaff60846a45ab43a2a0350a1.png)
![](https://img.xkw.com/dksih/QBM/2013/5/21/1573654375727104/1573654382084096/STEM/11cb889f67654b93ad6d88e58e32bfd6.png?resizew=219)
(1)求该抛物线的表达式;
(2)点D的坐标为(-3,0),点P为线段AB上一点,当锐角∠PDO的正切值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)在(2)的条件下,该抛物线上的一点E在x轴下方,当△ADE的面积等于四边形APCE的面积时,求点E的坐标.
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【推荐2】如图,抛物线
与
轴的一个交点是
,与
轴交于
点,点
在拋物线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/a0f78fe7-bc74-4ed8-9e57-951c03390672.png?resizew=150)
(1)求
的值;
(2)过点
作
轴的垂线交直线
于点
,设点
的横坐标为
,
,求
关于
的函数关系式;
(3)当
是直角三角形时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/102068e41a208a7ba4fc87a125d08ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6bbbb53aaeab0ab7a242228cc510fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/a0f78fe7-bc74-4ed8-9e57-951c03390672.png?resizew=150)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f390a2e46cfa940a434293de5d7412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dce817f45214423c18437df44548845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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名校
【推荐1】已知抛物线
:
的顶点为A,与
轴交于点B.
(1)求A,B两点坐标;
(2)平移抛物线
:
得到抛物线
,抛物线
交
轴正半轴于一点
,在抛物线
上是否存在点
,使得以A,
,
,
为顶点的四边形是面积为
的平行四边形?若存在,请求出满足条件的抛物线
的表达式;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92738aadeac1e3d3d8e919772bce727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求A,B两点坐标;
(2)平移抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92738aadeac1e3d3d8e919772bce727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.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/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
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【推荐2】已知,点
,点
和抛物线
,将抛物线
沿着
轴方向平移经过点
,画出平移后的抛物线如图所示.
(1)平移后的抛物线是否经过点
?说明你的理由;
(2)在平移后的抛物线上且位于直线
下方的图像上是否存在点
,使
?若存在,请求出点
的坐标;若不存在,请说明理由;
(3)在平移后的抛物线上有点
,过点
作直线
的垂线,垂足为
,连接
,当
时,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf2455cbacd435b7566b40b32b8ed7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266c42a10c13c00114ae371b2d9f728d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48f28aeccf369df5980ac787e9e313f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf2455cbacd435b7566b40b32b8ed7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/6d27652c-e708-4288-9ab4-c6693fa48d38.png?resizew=700)
(1)平移后的抛物线是否经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266c42a10c13c00114ae371b2d9f728d.png)
(2)在平移后的抛物线上且位于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1dac7c76f0f6e5291329a4a23eab39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)在平移后的抛物线上有点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd24f3c4bc9f9a75d4b28630bb630d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091145fcc157587a3fc8e0b7c7c0ecb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b5d523373b8cbfa33e42a1bf154544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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解题方法
【推荐1】如图,抛物线C:
的对称轴为直线
,且抛物线经过
,
两点,与x轴交于点N.
![](https://img.xkw.com/dksih/QBM/2022/10/19/3090966411558912/3094011604516864/STEM/43b6f1f43e884c86b4a6deb6a0074bfd.png?resizew=222)
(1)点N的坐标为 ;
(2)已知抛物线
与抛物线C关于y轴对称,且抛物线
与x轴交于点A,
(点A在点
的左边);
①抛物线
的解析式为 ;
②当抛物线
和抛物线C上y都随x的增大而增大时,请直接写出此时x的取值范围.
(3)若抛物线∁n的解析式为
,抛物线
的顶点为
,与x轴的交点为A,
(点A在点
的左边).
①求
的值;
②判断抛物线的顶点
,
,
,…,
是否在一条直线上,若在,请直接写出该直线的解析式;若不在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff32df158dd2d590af5646657afb0101.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ea1044a9b40cc45d051787f8658e5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d78bdd44a5b6596e258f3e3a62e4d03.png)
![](https://img.xkw.com/dksih/QBM/2022/10/19/3090966411558912/3094011604516864/STEM/43b6f1f43e884c86b4a6deb6a0074bfd.png?resizew=222)
(1)点N的坐标为 ;
(2)已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
①抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
②当抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)若抛物线∁n的解析式为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5841ce5b66a8d8e5aeb7c34ddea07f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc31dcdb99754fc452ff2b92a2fb8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f9f94f4e028161d5b7b5fb49f082a9.png)
②判断抛物线的顶点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
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【推荐2】如图,已知矩形
的顶点A在y轴上,顶点B的坐标是
,抛物线
(m是常数)的顶点是P.
(2)若抛物线经过点A,则抛物线是否与线段
有另一个交点E.若有,求出
的正切值;若没有,请说明理由;
(3)若抛物线被矩形
所截,其在矩形
内部的图象所对应的函数值y随x的增大而增大,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad246c8f288d46b068f1f8e2fdbd29b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e3d3fe82f6c1591fc4959a9d543b95.png)
(2)若抛物线经过点A,则抛物线是否与线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9b4a78c3b85dafdaec2e4e6dc87bd7.png)
(3)若抛物线被矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
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【推荐1】已知抛物线
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/728d020a-2107-4c01-a8a6-165cff2c7409.png?resizew=369)
(1)关于抛物线
,下列结论正确的有______________(填序号).
①开口向上;
②与
轴没有交点;
③必经过定点
和
.
(2)如图1,若抛物线
的顶点为D,开口向下,与y轴交于点C且
的面积为1.5
①求抛物线
的表达式和顶点坐标;
②如图2,
是二次函数
在第二象限图像上的一点,过点
作
轴,且与二次函数
的图像交于点
,求线段
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47749c91c209741c9f81337c9ce92b9b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/728d020a-2107-4c01-a8a6-165cff2c7409.png?resizew=369)
(1)关于抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
①开口向上;
②与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
③必经过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
(2)如图1,若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47749c91c209741c9f81337c9ce92b9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
①求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
②如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787a68c1004e568a7d5b0ad96c7bccdf.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/8994824fdef015b1276b6cc96e5dfa07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐2】如图所示,已知两点A(-1,0),B(4,0),以AB为直径的半圆P交y轴于点C.
(1)求经过A、B、C三点的抛物线的解析式;
(2)设弦AC的垂直平分线交OC于D,连接AD并延长交半圆P于点E,
与
相等吗?请证明你的结论;
(3)设点M为x轴负半轴上一点,OM=
AE,是否存在过点M的直线,使该直线与(1)中所得的抛物线的两个交点到y轴的距离相等?若存在,求出这条直线对应函数的解析式;若不存在.请说明理由.
(1)求经过A、B、C三点的抛物线的解析式;
(2)设弦AC的垂直平分线交OC于D,连接AD并延长交半圆P于点E,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eaa6352e352874aa4b4da6e5d420f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70409b7474df0b308e0f7f4d7544e771.png)
(3)设点M为x轴负半轴上一点,OM=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2014/6/5/1573732813651968/1573732819951616/STEM/0e651de52c284b2ea38bb89187b6e43f.png)
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