如图,在平面直角坐标系中,点A坐标为
,点C在y轴正半轴,且
,抛物线
经过A、C两点,与x轴的另一交点为点B.
(2)点
为直线
上方抛物线上一动点;
①联结
、
,设直线
交线段
于点
,
的面积为
,
的面积为
,当点
的横坐标为
时,求
的值(用含
的代数式表示);
②是否存在点
,使
等于
的2倍?若存在,求点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079dd115a4b8cbc93918a853363786dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e009fc8d3149cd8660f6e7b8a29710c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①联结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9290b887e88e8d2fd774a7314e2ca73a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
更新时间:2024-06-21 07:02:58
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】在平面直角坐标系
中,以点A(3,0)为圆心,5为半径的圆与
轴相交于点
、
(点B在点C的左边),与
轴相交于点D、M(点D在点M的下方).
(1)求以直线x=3为对称轴,且经过D、C两点的抛物线的解析式;
(2)若E为直线x=3上的任一点,则在抛物线上是否存在这样的点F,使得以点B、C、E、F为顶点的四边形是平行四边形?若存在,求出点F的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2012/2/8/1573338137673728/1573338344185856/STEM/2aba004efe724e5b92e0f6e00b05179c.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2012/2/8/1573338137673728/1573338344185856/STEM/e108f60b22c0425a877fb912af962f58.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求以直线x=3为对称轴,且经过D、C两点的抛物线的解析式;
(2)若E为直线x=3上的任一点,则在抛物线上是否存在这样的点F,使得以点B、C、E、F为顶点的四边形是平行四边形?若存在,求出点F的坐标;若不存在,说明理由.
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【推荐2】已知,如图1,直线y=
x+3与x轴、y轴分别交于A、C两点,点B在x轴上,点B的横坐标为
,抛物线经过A、B、C三点.点D是直线AC上方抛物线上任意一点.
(1)求抛物线的函数关系式;
(2)若P为线段AC上一点,且S△PCD=2S△PAD,求点P的坐标;
(3)如图2,连接OD,过点A、C分别作AM⊥OD,CN⊥OD,垂足分别为M、N.当AM+CN的值最大时,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31da7291140e430a11e2a10cc6cdefbb.png)
(1)求抛物线的函数关系式;
(2)若P为线段AC上一点,且S△PCD=2S△PAD,求点P的坐标;
(3)如图2,连接OD,过点A、C分别作AM⊥OD,CN⊥OD,垂足分别为M、N.当AM+CN的值最大时,求点D的坐标.
![](https://img.xkw.com/dksih/QBM/2018/11/29/2086186929815552/2090134238871552/STEM/abcf9ea21001475ca77c2dd0c01c29f3.png?resizew=363)
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解题方法
【推荐1】如图,在平面直角坐标系中,抛物线
(
)与
轴交于点
、
,与
轴交于点
,且
,点
是第一象限内抛物线上的动点.
(1)求抛物线的解析式;
(2)连接
与
,交于点
,当
的值最大时,求点
的坐标;
(3)点
在抛物线上运动,点
在
轴上运动,是否存在点
、点
.使
,且
与
相似,若存在,请求出点
、点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.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/db9b0cc1b7c5c56b72fa08dfd023e9f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(1)求抛物线的解析式;
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75245cce3f6eb4ca71cb7cca0050d29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c447ca190f5168a07befbbfa8471ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7ffcd1925a2b1259221c6a476152f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734242590720000/2737840484638720/STEM/69b62a28-46db-4672-bb9e-fc11d1349828.png)
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解答题-证明题
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(0.4)
【推荐2】如图,
内接于
,点D在弧
上,连接
交
于点E,连接
,
;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/6a9b27a5-28ab-4fa5-947c-d742a092b589.png?resizew=500)
(1)如图1,求证:
;
(2)如图2,连接
并延长交
的延长线于点F,若
,
,求证:
;
(3)在(2)的条件下,如图3,点M是线段
的中点,连接
,若
的面积为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5089bc2eed3e0cca034394555550799.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/6a9b27a5-28ab-4fa5-947c-d742a092b589.png?resizew=500)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be86349e06431647f8e359d9bd07700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2e1083b773e16d1e385072652f7319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
(3)在(2)的条件下,如图3,点M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bef6516358878a47560b1d9eff2d5c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
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【推荐3】如图1,四边形OMTN中,OM =ON,TM =TN,我们把这种两组邻边相等的四边形叫做筝形.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897725544472576/2915514945413120/STEM/c10b3ba0-78a8-4e6e-8623-293f8ad8d4a0.png?resizew=542)
(1)探究结论:试探究筝形对角线之间的位置关系,并证明你的结论;
(2)尝试应用:如图2,在筝形ABCD中,已知DC=AD=10,AB=CB,BC>CD,BD,AC为对角线,AC=16.若存在一个圆使得A,B,C,D四个点都在这个圆上,试求出这个圆的半径;
(3)拓展延伸:如图,将正方形ABCD绕点B逆时针旋转30°,得到正方形GBEF,AD与EF相交于点K,延长DA交GF于点H.①证明四边形KABE是筝形 ;②若AB=
,求AH的长.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897725544472576/2915514945413120/STEM/c10b3ba0-78a8-4e6e-8623-293f8ad8d4a0.png?resizew=542)
(1)探究结论:试探究筝形对角线之间的位置关系,并证明你的结论;
(2)尝试应用:如图2,在筝形ABCD中,已知DC=AD=10,AB=CB,BC>CD,BD,AC为对角线,AC=16.若存在一个圆使得A,B,C,D四个点都在这个圆上,试求出这个圆的半径;
(3)拓展延伸:如图,将正方形ABCD绕点B逆时针旋转30°,得到正方形GBEF,AD与EF相交于点K,延长DA交GF于点H.①证明四边形KABE是筝形 ;②若AB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
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【推荐1】如图,抛物线y=ax2+bx+2交x轴于点A(﹣3,0)和点B(1,0),交y轴于点C.
(1)求该抛物线的解析式;
(2)点D的坐标为(﹣1,0),点P为第二象限内抛物线上的一个动点,求四边形ADCP面积的最大值;
(3)抛物线对称轴上是否存在点M,使△MAB是以AB为斜边的直角三角形,若存在,请直接写出点M的坐标;若不存在,并说明理由;
(4)在对称轴上是否存在点N,使△BCN为直角三角形,若存在,直接写出N点坐标,若不存在,说明理由.
(1)求该抛物线的解析式;
(2)点D的坐标为(﹣1,0),点P为第二象限内抛物线上的一个动点,求四边形ADCP面积的最大值;
(3)抛物线对称轴上是否存在点M,使△MAB是以AB为斜边的直角三角形,若存在,请直接写出点M的坐标;若不存在,并说明理由;
(4)在对称轴上是否存在点N,使△BCN为直角三角形,若存在,直接写出N点坐标,若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2022/1/5/2887727850364928/2889343368536064/STEM/4bc4f4ac-cc6f-4dea-b731-1c522c7e086f.png?resizew=527)
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【推荐2】如图,平面直角坐标系中,四边形OABC为矩形,点A,B的坐标分别为(4,0),(4,3),动点M,N分别从O,B同时出发.以每秒1个单位的速度运动.其中,点M沿OA向终点A运动,点N沿BC向终点C运动.过点M作MP⊥OA,交AC于P,连接NP,已知动点运动了x秒.
(1)求P点的坐标(用含x的代数式表示);
(2)试求△NPC面积S的表达式,并求出面积S的最大值及相应的x值;
(3)设四边形OMPC的面积为S1,四边形ABNP的面积为S2,请你就x的取值范围讨论S1与S2的大小关系并说明理由;
(4)当x为何值时,△NPC是一个等腰三角形?
(1)求P点的坐标(用含x的代数式表示);
(2)试求△NPC面积S的表达式,并求出面积S的最大值及相应的x值;
(3)设四边形OMPC的面积为S1,四边形ABNP的面积为S2,请你就x的取值范围讨论S1与S2的大小关系并说明理由;
(4)当x为何值时,△NPC是一个等腰三角形?
![](https://img.xkw.com/dksih/QBM/2018/12/16/2098130400378880/2101615158272000/STEM/55bb596fcbb54358abe3902513ddac6e.png?resizew=210)
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【推荐1】如图,在平面直角坐标系中,点
为坐标原点,抛物线
的顶点是
,点
恰好在抛物线上,
与抛物线的对称轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/c91be164-f28d-4c5b-977c-9ad1dfb320ba.png?resizew=273)
(1)求抛物线的解析式;
(2)
是线段
上一动点,且不与点
,
重合,过点
作平行于
轴的直线,与
的边分别交于
,
两点,将
以直线
为对称轴翻折,得到
,设点
的纵坐标为
.当点
在
的内部时,求
的取值范围;
(3)点
在抛物线上,且
,求点
的横坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b2cc0d2f6d3eee9a33db83e0c0830d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22340d6f2582502d69a5cb85f446ff43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/c91be164-f28d-4c5b-977c-9ad1dfb320ba.png?resizew=273)
(1)求抛物线的解析式;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e7040c2fd8a163d71e35805775feb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f75f141646d9805419fb886d06865ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】如图,抛物线
经过
,
两点,与
轴交于点
.
![](https://img.xkw.com/dksih/QBM/2020/3/4/2412434244812800/2412950202351616/STEM/6677fbfd00f84d1c81c4bdb0b4003b24.png?resizew=152)
(1)求拋物线的解析式;
(2)已知点
,在抛物线的对称轴上是否存在一点
,使得
周长最小,如果存在,求出点
的坐标;如果不存在,请说明理由.
(3)在
轴上,是否存在点
使得
,若存在,求出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527adf33876b600568772d6ff0a91310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c044362183e52c9f684765b8a77fba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2020/3/4/2412434244812800/2412950202351616/STEM/6677fbfd00f84d1c81c4bdb0b4003b24.png?resizew=152)
(1)求拋物线的解析式;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7c7b931a9ac039a6dcb0315006d770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7c9440ba5df23afb1466ec1bf03a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4149fc2adce8bb4f7ca36048a4b2478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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