如图,直线
交
轴于点
,交
轴于点B,抛物线
的顶点为
,且经过点
.
(1)求该抛物线所对应的函数表达式;
(2)点
是抛物线上的点,
是以
为直角边的直角三角形,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527644f53abbcfd2e8457da020cb0262.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb0140664496d7ed97ad9675461300f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求该抛物线所对应的函数表达式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/23/2599127601209344/2604702696259584/STEM/a577d9ac-dc73-4ac6-b061-627273227225.png)
20-21九年级上·福建泉州·期中 查看更多[2]
更新时间:2020-12-01 11:04:06
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相似题推荐
解答题-证明题
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【推荐1】直线
分别与x轴y轴相交与A,B两点,
原点O及A,B两点,C是
上一点,连接
交
于点D,
.
(1)证明:
.
(2)直线
上是否存在点P,使得
的周长最小?若存在,请求出P点坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1373d9cbd0d4acf2d986890f6beaef67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5ab74296abcbcf994c02b5834cd699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3b6c298393a4878f1c786c162b9f5a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/13/e5c35399-fcb9-4a1b-a0fb-d2e36c68584d.png?resizew=167)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cad39ccdd4fe036dbf08efa9b20a842.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5b7ba12696a28104d8e7d70f85a917.png)
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【推荐2】如图,在平面直角坐标系
中,直线
分别交x轴,y轴于A,
两点,直线
交
轴于C点,交直线m于点
.
,
,
;
(2)点D是直线m上一点,E是直线l上的一点,若
与
互相平分,求点E的坐标及四边形
的面积;
(3)N是平面直角坐标系内一点,直线l上是否存在点M,使以点B,C,M,N为顶点的四边形是菱形,请求出符合条件的点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce75685da2665dd2a1ec34c5c79986a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc07e3e8cba944da58c46a7e15390ad6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a02d480d8e7495e2c093a5c7bb6d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b6672baa5c7413c5a0a7832b19947c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)点D是直线m上一点,E是直线l上的一点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(3)N是平面直角坐标系内一点,直线l上是否存在点M,使以点B,C,M,N为顶点的四边形是菱形,请求出符合条件的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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【推荐3】如图1,已知直线
与坐标轴分别交于点A、B两点,与直线
交于点
, 点
在直线
上运动,过M作直线垂直于x轴,垂足为D,该直线与直线
交于点N.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/739730bc-5475-4261-9fd5-c157c72b430c.png?resizew=569)
(1)求t、b的值;
(2)若点
在
内部,直接写出q的取值范围_________;
(3)若点
在线段CB上运动.
①若
,求四边形
的面积;
②若点M是线段
的三等分点,求m的值.
(4)如图2,点
在直线
上,过A点作
直线
,垂足为H,将
沿直线
翻折得
,当点M从点B运动到点E的过程中,点
也随之运动,请直接写出点
运动的路径长为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13653a89d3a38346e1ddf4fd1602f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79f6645bb02b07b9e384c85957cf91a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9830acda0cc6c2fa6e398ac2c2fd4e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13653a89d3a38346e1ddf4fd1602f85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/739730bc-5475-4261-9fd5-c157c72b430c.png?resizew=569)
(1)求t、b的值;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e521ab14c5572836b653649bd3c7f969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16a00ffc890ef8cfc038e5039983773.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9830acda0cc6c2fa6e398ac2c2fd4e85.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7dbbb05e1fcfcbd181cf9d7402b736.png)
②若点M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
(4)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ed26b8aa1c616dec9aa76507f787eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13653a89d3a38346e1ddf4fd1602f85.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86163e76653de1f383788b741fb64a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86163e76653de1f383788b741fb64a8b.png)
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【推荐1】如图,在平面直角坐标系xOy中,O为坐标原点,点A(6,0),点B(0,6),△ABO的中线AC与y轴交于点C,且⊙M经过O,A,C三点.
(1)圆心M的坐标为 ;
(2)抛物线经过点B,且以圆心M为顶点,求抛物线的解析式;
(3)若直线AD与⊙M相切于点A,交y轴于点D,求直线AD的函数表达式;
(4)若(2)中的抛物线上有一动点P,过点P作PE∥y轴,交(3)中的直线AD于点E.若以PE为半径的⊙P与直线AD相交于另一点F.求EF的最小值.
(1)圆心M的坐标为 ;
(2)抛物线经过点B,且以圆心M为顶点,求抛物线的解析式;
(3)若直线AD与⊙M相切于点A,交y轴于点D,求直线AD的函数表达式;
(4)若(2)中的抛物线上有一动点P,过点P作PE∥y轴,交(3)中的直线AD于点E.若以PE为半径的⊙P与直线AD相交于另一点F.求EF的最小值.
![](https://img.xkw.com/dksih/QBM/2020/12/21/2619166229143552/2624478645190656/STEM/8e4859f9d4f3417e97991ecdfeaaf114.png?resizew=221)
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名校
【推荐2】已知抛物线
(a为常数,
)交x轴于点
和点
,交y轴于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/608e9e3c-135e-4d1b-83bc-62525eba9bd5.png?resizew=347)
(1)求点C的坐标和抛物线的解析式;
(2)P是抛物线上位于直线
上方的动点,过点P作y轴的平行线,交直线
于点D,当
取得最大值时,求点P的坐标;
(3)M是抛物线的对称轴l上一点,N为抛物线上一点.当直线
垂直平分
的边
时,求点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad97284da351a44c36c11d5cec429a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109a293cef44f23e86e22c1a4cfcbbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/8/608e9e3c-135e-4d1b-83bc-62525eba9bd5.png?resizew=347)
(1)求点C的坐标和抛物线的解析式;
(2)P是抛物线上位于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(3)M是抛物线的对称轴l上一点,N为抛物线上一点.当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐1】如图,抛物线
与
轴交于A、B两点,与
轴交于点C,直线
过B、C两点,连接AC.
![](https://img.xkw.com/dksih/QBM/2021/6/28/2752746725834752/2753273200451584/STEM/acd565f6-12ce-4943-9a68-0d68d6ec4680.png)
(1)求抛物线的解析式;
(2)求证:
;
(3)点
是抛物线上的一点,点D为抛物线上位于直线BC上方的一点,过点D作
轴交直线BC于点E,点P为抛物线对称轴上一动点,当线段DE的长度最大时,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.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/cc9118cc77fc0a045337745890e50cad.png)
![](https://img.xkw.com/dksih/QBM/2021/6/28/2752746725834752/2753273200451584/STEM/acd565f6-12ce-4943-9a68-0d68d6ec4680.png)
(1)求抛物线的解析式;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767bcca107034191460cd6fe3f17e7bf.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d12ed430d52fc0ba03785273eda3d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7b80ee2a36db974259268287206c2d.png)
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真题
【推荐2】图10是小红设计的钻石形商标,△ABC是边长为2的等边三角形,四边形ACDE是等腰梯形,AC∥ED,∠EAC=60°,AE=1.
(1)证明:△ABE≌△CBD;
(2)图中存在多对相似三角形,请你找出一对进行证明,并求出其相似比(不添加辅助线,不找全等的相似三角形);
(3)小红发现AM=MN=NC,请证明此结论;
(4)求线段BD的长.
(1)证明:△ABE≌△CBD;
(2)图中存在多对相似三角形,请你找出一对进行证明,并求出其相似比(不添加辅助线,不找全等的相似三角形);
(3)小红发现AM=MN=NC,请证明此结论;
(4)求线段BD的长.
![](https://img.xkw.com/dksih/QBM/2011/8/2/1573232498319360/1573232561315840/STEM/3e01f188fd76418b8932a9c2dcc9bbab.png)
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【推荐1】已知抛物线
经过
,且顶点在y轴上.
(1)求抛物线解析式;
(2)直线
与抛物线交于A,B两点.
①点P在抛物线上,当
,且
为等边三角形时,求c的值;
②设直线
交x轴于点
,线段AB的垂直平分线交y轴于点N,当
,
时,求点N纵坐标n的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9553fb9beb9ed49ea5f7a0f077884d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f628d06824d9f3b2be4d4d5255c88d0.png)
(1)求抛物线解析式;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffe3400ea9733d0a16ffa44dc0fab4a.png)
①点P在抛物线上,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
②设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffe3400ea9733d0a16ffa44dc0fab4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863c02abae79d0eabeeafdc0ec5a7c9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c1e694181da1418c04e7b18de987ab.png)
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【推荐2】抛物线y=ax2+2x+c与x轴交于点A(﹣2,0)和点B,与y轴交于点C(0,6),点D(m,0)是x轴上一点,过点D作直线DF⊥x轴,交直线BC于点E,交抛物线于点F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/62b732cd-d866-4e78-b316-4ef7b6eb6828.png?resizew=205)
(1)求抛物线的解析式;
(2)如图,连接BF,当tan∠FBC=
时,求出点E的坐标;
(3)当△CEF是等腰三角形时,请直接写出点F的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/62b732cd-d866-4e78-b316-4ef7b6eb6828.png?resizew=205)
(1)求抛物线的解析式;
(2)如图,连接BF,当tan∠FBC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)当△CEF是等腰三角形时,请直接写出点F的坐标.
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