如图,直线
与
轴交于点B,与
轴交于点C,已知二次函数的图象经过点B、C和点A(-1,0).
(1)求该二次函数的关系式;
(2)若抛物线的对称轴与
轴的交点为点D,则在抛物线的对称轴上是否存在点P,使△PCD是以CD为腰的等腰三角形?如果存在,直接写出P点的坐标;如果不存在,请说明理由;
(3)点E是线段BC上的一个动点,过点E作x轴的垂线与抛物线相交于点F,当点E运动到什么位置时,四边形CDBF的面积最大?求出四边形CDBF的最大面积及此时E点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9118cc77fc0a045337745890e50cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求该二次函数的关系式;
(2)若抛物线的对称轴与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)点E是线段BC上的一个动点,过点E作x轴的垂线与抛物线相交于点F,当点E运动到什么位置时,四边形CDBF的面积最大?求出四边形CDBF的最大面积及此时E点的坐标.
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654850686320640/1657577952747520/STEM/092aa4ffbc7d497b89bb197fec9b1c22.png?resizew=204)
更新时间:2017-04-03 07:33:53
|
相似题推荐
解答题-问答题
|
困难
(0.15)
【推荐1】如图在平面直角坐标系中,一次函数
的图象与
轴交于点
,与
轴交于点
,二次函数
的图象经过
,
两点,且与
轴的负半轴交于点
,动点
在直线
下方的二次函数图象上.
(2)如图1,连接
,
,设
的面积为
,求
的最大值及此时点D坐标;
(3)点P在抛物线的对称轴上,平面内是否存在一点Q,使以B、C、P、Q为顶点的四边形是菱形?若存在,直接写出点P的坐标;若不存在,请说明理由:
(4)如图2,过点
作
于点
,是否存在点
,使得
中的某个角恰好等于
的2倍?若存在,直接写出点
的横坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24edd2a1d145627d07330524017daf5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c468dc5cc34c14a188493a21019e8f83.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f010b76578240c9efbbe0bc173d24714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(3)点P在抛物线的对称轴上,平面内是否存在一点Q,使以B、C、P、Q为顶点的四边形是菱形?若存在,直接写出点P的坐标;若不存在,请说明理由:
(4)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07789d6a8259ac89144caa816aaaf47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcadfe7ed481a941d2c92a4d9ccee073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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解答题-证明题
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名校
解题方法
【推荐2】在平面直角坐标系
中,抛物线
与x轴相交于A,B(点A在点B的左边),抛物线顶点为P,
(1)点A、B的坐标分别为 、 ,顶点P的坐标为 (用a表示);
(2)如图1,点M为抛物线上任意一点(异于顶点P),过点P作直线
轴,作
于点N,若
,求k的值(用含a的代数式表示)
(3)当M点的横坐标为4时,
①如图2,连接
、
分别交
、
于点E、F,求证:
.
②如图3,点Q为抛物线上点P至点M之间的一动点,连接
并延长交
于点E,连接
并延长交
于点F,当
时,
的值是否发生变化,若不变,求出该定值;若变化,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f21b99912d94071d004d76361b0439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148fab2e8b5e29602056adfca3eb5d97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/18f0baa0-8428-4d2b-ac63-406fc641a8a0.png?resizew=554)
(1)点A、B的坐标分别为 、 ,顶点P的坐标为 (用a表示);
(2)如图1,点M为抛物线上任意一点(异于顶点P),过点P作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fc01344af3800a30595b9403086516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33a3f384acb53b5a21521a77ac0b1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd5731d6cdbad482b17f540f4ce361d.png)
(3)当M点的横坐标为4时,
①如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbca1d702ae264cab42aa5de0150385.png)
②如图3,点Q为抛物线上点P至点M之间的一动点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53ee73ecb4751e0ad3e226f1e4b32a08.png)
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解答题-问答题
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困难
(0.15)
【推荐1】抛物线y=ax2+c的顶点为C(0,1),与直线y=kx+3(k为常数)相交于A(x1,y1),B(x2,y2)两点.当k=0时,点B的横坐标恰好为2(如图1).
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416130977792/STEM/99f920234c6243c4b662c3f86589b978.png?resizew=483)
(1)求a、c的值;
(2)当k=0时,若点P是抛物线上异于A、C的一点,且满足2PC2=AB2+2AP2,试判断△PAC的形状,并说明理由;
(3)若直线y=﹣1交y轴于点F,过点A、B分别作该直线的垂线,垂足分别为D、E,连接AF、BF(如图2).设△ADF、△ABF、△BEF的面积分别为S1、S2、S3,是否存在常数t,使S22=t•S1S3?若存在,求出t的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416130977792/STEM/99f920234c6243c4b662c3f86589b978.png?resizew=483)
(1)求a、c的值;
(2)当k=0时,若点P是抛物线上异于A、C的一点,且满足2PC2=AB2+2AP2,试判断△PAC的形状,并说明理由;
(3)若直线y=﹣1交y轴于点F,过点A、B分别作该直线的垂线,垂足分别为D、E,连接AF、BF(如图2).设△ADF、△ABF、△BEF的面积分别为S1、S2、S3,是否存在常数t,使S22=t•S1S3?若存在,求出t的值;若不存在,请说明理由.
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【推荐2】在平面直角坐标系中,点
为坐标原点,抛物线
交
轴于
、
两点,交
轴于
,连接
,
.
(1)如图1,求
的值;
(2)如图2,点
在第一象限的抛物线上,连接
、
,设点
的横坐标为
,
的面积为
,求
与
之间的函数关系式(不用写出
的取值范围);
(3)如图3,在(2)的条件下,连接
交
于
,点
在
的延长线上,连接
,
交
轴于
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d89057bac47a9d19b74b34a5fffd9d9.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c494fd0f2e9e941ef35bf29759d592.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/5/7c7e71db-b56a-49fe-8c11-b695f8d57bbd.png?resizew=520)
(1)如图1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff09e0d0e21ddbe6fb96d53e09a9f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a16f5621716bfef7a056a3f2712feb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4775fb58dcc83315faeb68cff8f934b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22acb04d7b15db9efe470bbd74d1daba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
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解答题-问答题
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解题方法
【推荐1】二次函数
的图象与x轴交于两点A、B,与y轴交于点C,且
.
(1)求此二次函数的表达式;
(2)如图1,点E是第一象限内的抛物线上的动点,过点E作![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
y轴交直线
于点F,
①连接
,当点E运动到什么位置时,
的面积最大?求
面积的最大值;
②当
是等腰三角形时,求点E坐标;
(3)如图2,点M在抛物线上,且点M的横坐标是1,将射线
绕点M逆时针 旋转
交抛物线于点D,求点D的坐标;
(4)如图3,点P是抛物线的顶点,抛物线的对称轴与x轴交于点Q,过点P作![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
交x轴于点N,在抛物线的对称轴上是否存在一点H,使得
,若存在,直接写出点H的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/351eb033449e6f4e71f9c2e5607908aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/7/2ef00878-8245-4138-9f95-28e43d9ee5fd.png?resizew=463)
(1)求此二次函数的表达式;
(2)如图1,点E是第一象限内的抛物线上的动点,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c41d752591e4a2aec0d8785e9bcf1b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
(3)如图2,点M在抛物线上,且点M的横坐标是1,将射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
(4)如图3,点P是抛物线的顶点,抛物线的对称轴与x轴交于点Q,过点P作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0775dc0d40db7eb3f9070523886135cd.png)
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解题方法
【推荐2】如图1,抛物线y=ax2+bx+3过点A(﹣1,0),点B(3,0),与y轴交于点C.M是抛物线任意一点,过点M作直线l⊥x轴,交x轴于点E,设M的横坐标为m(0<m<3).
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416133042176/STEM/0a320ba294a54df8945f5cf2ccbe05e4.png?resizew=499)
(1)求抛物线的解析式及tan∠OBC的值;
(2)当m=1时,P是直线l上的点且在第一象限内,若△ACP是直角三角形时,求点P的坐标;
(3)如图2,连接BC,连接AM交y轴于点N,交BC于点D,连接BM,设△BDM的面积为S1,△CDN的面积为S2,求S1﹣S2的最大值.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923424480198656/2927416133042176/STEM/0a320ba294a54df8945f5cf2ccbe05e4.png?resizew=499)
(1)求抛物线的解析式及tan∠OBC的值;
(2)当m=1时,P是直线l上的点且在第一象限内,若△ACP是直角三角形时,求点P的坐标;
(3)如图2,连接BC,连接AM交y轴于点N,交BC于点D,连接BM,设△BDM的面积为S1,△CDN的面积为S2,求S1﹣S2的最大值.
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【推荐3】如图,已知抛物线
与
轴交于
,
两点(
点位于
点左侧),与
轴交于
点,连接
.点
为抛物线的顶点,点
为
.
(1)点
是第四象限内抛物线上的一点,过点
作
轴交抛物线于点
,作
轴于点
,作
轴于点
,点
在点
右边.点
是直线
上一个动点,点
是直线
上一个动点,当四边形
的周长最大时,求
的最小值;
(2)如图2,将原抛物线绕其对称轴与
轴的交点
旋转
得新的抛物线
,点
,
的对应点分别记为
,
,把抛物线
沿直线
平移,
,
的对应点分别记为
,
是否存在点
,使得
是以
为腰的等腰三角形?若存在,请直接写出
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a01f388fba84f60e5e3b3dd7b04306eb.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec40ff4479edca2ed18b6cadb8db72f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/19/bd3bdc5b-f19d-45f7-a361-2e2e45b98f61.png?resizew=499)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92d97e1136fe9f48fcd5c8bbdc2dbe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b1da9046b4cb82135a4a1eaa528c53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f107bd06ad6af2ff8d5aaa9ace12d9a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ddeb7ce17137144641f061042c14fb.png)
(2)如图2,将原抛物线绕其对称轴与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86380a6d6501f6504dcb4aa5e3099f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b633158f7d9c35d476a324a683f458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86380a6d6501f6504dcb4aa5e3099f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae863e7a1f1fed09f1075de4a817c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e62111c5c2f7551a7aa7ebb9da952e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e423cacaad9bf4b26ce49536c9787c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
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