已知:二次函数
的图象与
轴交于
两点,其中点
,与
轴负半轴交于点
,起对称轴是直线
.
(1)求二次函数
的解析式;
(2)圆
经过点
的外接圆,点
是
延长线上一点,
的平分线交圆
于点
,连接
、
,求
的面积;
(3)在(2)的条件下,二次函数
的图象上是否存在点
,使得
?如果存在,请求出所有符合条件的
点坐标;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d37ebf395c6a256c56cdf2e81f53bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82db032bb71791987dba656c829f936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d599059e6b2c918ab15ee22611b6962.png)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(2)圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292337dce2c74ce4ea6d9ec165f51c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db866ecc0c098bfc32ec8a43b65bdd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292337dce2c74ce4ea6d9ec165f51c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)在(2)的条件下,二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96a8079320b77ee3769f23c3e576099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2020/4/9/2437924024696832/2438629650456576/STEM/e6284ac7ad6d455b96218aa62c8a019a.png?resizew=189)
更新时间:2020-04-10 19:47:38
|
相似题推荐
解答题-问答题
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困难
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【推荐1】如图,二次函数
的图象交x轴于点A、点B,其中点B的坐标为
,点C的坐标为
,过点A、C的直线交二次函数的图象于点D.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/cb574cc5-e1ff-46c5-8bf6-e5890938d5f0.png?resizew=197)
(1)求二次函数和直线
的函数表达式;
(2)连接
,则
的面积为________;
(3)在y轴上确定点Q,使得
,点Q的坐标为________;
(4)点M是抛物线上一点,点N为平面上一点,是否存在这样的点N,使得以点A、点D、点M、点N为顶点的四边形是以
为边的矩形?若存在,请你直接写出点N的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43029dfd2a2b47b764679b92dab02259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/19/cb574cc5-e1ff-46c5-8bf6-e5890938d5f0.png?resizew=197)
(1)求二次函数和直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4c625a55ef1d2920a0605d52c8da23.png)
(3)在y轴上确定点Q,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d2a276f84a34bdfb378c68855ac26e.png)
(4)点M是抛物线上一点,点N为平面上一点,是否存在这样的点N,使得以点A、点D、点M、点N为顶点的四边形是以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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名校
【推荐2】抛物线
与
轴交于点
,
,直线
与抛物线交于
,
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/c9eaaf8c-8764-41c5-bc68-23f79c389de2.png?resizew=431)
(1)求抛物线的解析式.
(2)在此抛物线的对称轴上是否存在一点
,使得
的周长最小?若存在,请求出点
的坐标;若不存在,请说明理由.
(3)若点
为直线
上方的抛物线上的一个动点(不与点
,
重合),将直线
上方的抛物线部分关于直线
对称形成爱心图案,动点
关于直线
对称的点为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a80827294e8be6eedce48701a3defed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460eda3a837597fabd47e77d371ca819.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/21/c9eaaf8c-8764-41c5-bc68-23f79c389de2.png?resizew=431)
(1)求抛物线的解析式.
(2)在此抛物线的对称轴上是否存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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【推荐3】如图,抛物线
与x轴交于A(-4,0)、B(2,0)两点,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/4/9/2954259874717696/2957257402761216/STEM/bec5628c-1363-4579-8ac5-4b808a068a29.png?resizew=487)
(1)求抛物线的解析式及顶点坐标;
(2)如图1,连接AC,BC,若点M是第二象限内抛物线上一点,过M作
轴,交AC于点N,过N作
交x轴于点D,求
的最大值及此时点M的坐标;
(3)如图2,在(2)的条件下,当
取最大值时,将抛物线
沿射线AC方向平移
个单位,得到新抛物线
,新抛物线与y轴交于点K,P为y轴右侧新抛物线上一点,过P作
轴交射线MK于点Q,连接PK,当
为等腰三角形时,直接写出点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://img.xkw.com/dksih/QBM/2022/4/9/2954259874717696/2957257402761216/STEM/bec5628c-1363-4579-8ac5-4b808a068a29.png?resizew=487)
(1)求抛物线的解析式及顶点坐标;
(2)如图1,连接AC,BC,若点M是第二象限内抛物线上一点,过M作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce5c0cf64a0d41ba16c26338fb2a993.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b84c1e483cbae5a5d7c7f71810d66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fad8b455a044e7e4d750f516daf4ebf.png)
(3)如图2,在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fad8b455a044e7e4d750f516daf4ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d52429c8324350309f77e7209a5c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4d2174f411d9db6ab7b2aea47818cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f27083267432a9352fb6677a07d461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd163d1012079fb190d4cec99bafa455.png)
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【推荐1】如图1,在
中,
,点P从点A出发以
速度沿
运动,点Q从A点出发以
的速度沿折线
运动.P、Q两点同时出发,当某一点运动
到达点B时,另一点距离点B还有
.设运动时间为
,
的面积为
,y关于x的函数图像由
两段组成,如图2所示.
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714342016237568/2714630588530688/STEM/0ff8e77f-a62f-4506-aa20-916c3472a70d.png)
(1)求a的值.
(2)求
的值.
(3)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d1f14871d90e2bf98a8cf740515ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e6fd0a8a79c8f7d016423d0d485ded.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d13fee8ed7a5cf783e554659b4fd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4309cc517da10cf325b0003e50d8da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9778ea7d7bdadafcad0f85eb3a4b7a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a9eed64d225267a58cd001db67e2a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18eaed5e51f1e0be4f756230c41c6504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eacd892f03da01942140679667792250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/5/2714342016237568/2714630588530688/STEM/0ff8e77f-a62f-4506-aa20-916c3472a70d.png)
(1)求a的值.
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e5d4f93699f8dcffb0e7840ca5597e.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9763846b1131e1e3e2d741ad95d5bb0.png)
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【推荐2】如图,在△ABC中,AB=AC=10cm,BD⊥AC于点D,且BD=8cm.点M从点A出发,沿AC的方向匀速运动,速度为2cm/s;同时直线PQ由点B出发,沿BA的方向匀速运动,速度为1cm/s,运动过程中始终保持PQ
AC,直线PQ交AB于点P、交BC于点Q、交BD于点F,连接PM,设运动时间为t秒(0<t<5).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/16212a9a-f6cd-4db7-992c-cbbf1969639b.png?resizew=183)
(1)当t为何值时,△APM与△ACB相似?
(2)设四边形PQCM的面积为y
,求y与t之间的函数关系式;
(3)连接PC,是否存在某一时刻t,使点M在线段PC的垂直平分线上?若存在,求出此时t的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/16212a9a-f6cd-4db7-992c-cbbf1969639b.png?resizew=183)
(1)当t为何值时,△APM与△ACB相似?
(2)设四边形PQCM的面积为y
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
(3)连接PC,是否存在某一时刻t,使点M在线段PC的垂直平分线上?若存在,求出此时t的值;若不存在,说明理由.
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【推荐3】如图,在矩形ABCD中,AB=8k,BC=5k(k为常数,且k>0),动点P在AB边上(点P不与A、B重合),点Q、R分别在BC、DA边上,且AP:BQ:DR=3:2:1.点A关于直线PR的对称点为A′,连接PA′、RA′、PQ.
(1)若k=4,PA=15,则四边形PARA′的形状是 ;
(2)设DR=x,点B关于直线PQ的对称点为B′点.
①记△PRA′的面积为S1,△PQB′的面积为S2.当S1<S2时,求相应x的取值范围及S2﹣S1的最大值;(用含k的代数式表示)
②在点P的运动过程中,判断点B′能否与点A′重合?请说明理由.
(1)若k=4,PA=15,则四边形PARA′的形状是 ;
(2)设DR=x,点B关于直线PQ的对称点为B′点.
①记△PRA′的面积为S1,△PQB′的面积为S2.当S1<S2时,求相应x的取值范围及S2﹣S1的最大值;(用含k的代数式表示)
②在点P的运动过程中,判断点B′能否与点A′重合?请说明理由.
![](https://img.xkw.com/dksih/QBM/2017/2/22/1633722683695104/1633722684129280/STEM/75595761cd8448e6bbdb07e630ef6b3e.png)
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解答题-证明题
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困难
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【推荐1】 【试题背景】已知:l ∥
∥
∥k,平行线l与
、
与
、
与k之间的距离分别为
1、
2、
3,且
1 =
3 = 1,
2 =" 2" .我们把四个顶点分别在l、
、
、k这四条平行线上的四边形称为“格线四边形”.
【探究1】(1)如图1,正方形
为“格线四边形”,
于点
,
的反向延长线交直线k于点
. 求正方形
的边长.
【探究2】(2)矩形
为“格线四边形”,其长 :宽 =" 2" :1 ,则矩形
的宽为 .(直接写出结果即可)
【探究3】(3)如图2,菱形
为“格线四边形”且∠
=60°,△
是等边三角形,
于点
, ∠
=90°,直线
分别交直线l、k于点
、
. 求证:
.
【拓 展】(4)如图3,l ∥k,等边三角形
的顶点
、
分别落在直线l、k上,
于点
,且
="4" ,∠
=90°,直线
分别交直线l、k于点
、
,点
、
分别是线段
、
上的动点,且始终保持
=
,
于点
.
猜想:
在什么范围内,
∥
?直接写出结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
【探究1】(1)如图1,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf5ffd8f32da5d4b7cb94c5245aec29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
【探究2】(2)矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
【探究3】(3)如图2,菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ea5c0d9dc2204354844d68cbb26038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb4c17acd5f41213dfea07dd2e5a95c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708f18bf26949797ad5c3d23c0783317.png)
【拓 展】(4)如图3,l ∥k,等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/79b0c1cda82adb6362a0bc66a9009169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2992b50f187b193f706ae8767e84963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
猜想:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2015/8/20/1573899175215104/1573899181457408/STEM/f65d3521aea84167b84192287689cdce.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
【推荐2】如图,菱形
中,对角线
和
交于点
,过点
作
分别交
、
于点
和点
,点
是
延长线上一点,且满足
,延长
交
于点
.
![](https://img.xkw.com/dksih/QBM/2021/2/2/2649630680334336/2681799369228288/STEM/3f2c3401-4a69-4914-819f-71019b5d87ef.png)
(1)若
,
,求
的长;
(2)求证:
;
(3)若
,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb26bc741cd439b98a581cc31266874e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/2021/2/2/2649630680334336/2681799369228288/STEM/3f2c3401-4a69-4914-819f-71019b5d87ef.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1719410d21e3de1242366ce2965e838c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851fd7a210416ad3451282543eee1fc4.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511b58a7b3f0fd3d47948f250312741d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6cbb6bfd5e881ae663be8dafe83d43.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐1】已知抛物线
与直线
交于
,B两点,与y轴交于点
.
(1)求抛物线的解析式;
(2)如图1,直线AB交
轴于点D,且
,求点B的坐标;
(3)如图2,当
时,在x轴上有且只有一点P,使
,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0310ce4692c85c9702f564923a55f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62dfe60e2f098c466a048b982151365.png)
(1)求抛物线的解析式;
(2)如图1,直线AB交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586fbeea37a46192582ee33df9295637.png)
(3)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a4eaa80b44625890339d6a0065c241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/f5ef3139-c3fc-4659-9b5d-8fcd49f01135.png?resizew=400)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】如图,抛物线
经过
,
两点,与y轴交于点C,P为第四象限内抛物线上一点,过点P作PM⊥x轴于点M,连接AC,AP,AP与y轴交于点D.
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968533882626048/2974397729374208/STEM/bf98cca1-6f3a-4874-a9f8-53da37d3410f.png?resizew=174)
(1)求抛物线的函数表达式.
(2)当∠MPA=2∠PAC时,求直线AP的函数表达式.
(3)在(2)的条件下,在抛物线的对称轴上是否存在点E,使以E,M,C为顶点的三角形是直角三角形?若存在,请直接写出点E的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527adf33876b600568772d6ff0a91310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15dae32953862fc6fbfb29645894a50.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968533882626048/2974397729374208/STEM/bf98cca1-6f3a-4874-a9f8-53da37d3410f.png?resizew=174)
(1)求抛物线的函数表达式.
(2)当∠MPA=2∠PAC时,求直线AP的函数表达式.
(3)在(2)的条件下,在抛物线的对称轴上是否存在点E,使以E,M,C为顶点的三角形是直角三角形?若存在,请直接写出点E的坐标;若不存在,请说明理由.
您最近一年使用:0次