如图,在平面直角坐标系中,直线
分别交
轴、
轴于A、B两点.抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
经过A、B两点,且与
轴的另一个交点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/a753ec48-96be-4998-a25d-31648a730b28.png?resizew=161)
(1)求该抛物线的解析式;
(2)点
为直线
上一点,点
为该抛物线上一点,且
、
两点的纵坐标都为
.点
为
轴上的点,若四边形
是平行四边形,请直接写出点
的坐标;
(3)若点
是线段
上的一个动点,过点
作
轴的垂线,交该抛物线于点
,连结
、
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.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/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2b5ee1eabb64358a3d9db2349b6fce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37df9dad3961893b22d6639c4311e267.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/a753ec48-96be-4998-a25d-31648a730b28.png?resizew=161)
(1)求该抛物线的解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
更新时间:2023-02-19 13:15:55
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【推荐1】如图,在矩形
中,点
为原点,
、
的长是方程
的两根(
).抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764913d17f4fcfc04dcc61ebac0a82fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
经过点
、
,与
交于点
.
(1)求抛物线的函数解析式;
(2)点
为线段
上一个动点(不与点
重合),点
为线段
上一个动点,
,连接
,设
,
的面积为
.
①求
关于
的函数表达式;
②当
最大时,点
的坐标为 ;
③当
最大时,点
在抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764913d17f4fcfc04dcc61ebac0a82fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
的对称轴上,点
是平面内任意一点,是否存在点
、
,使得以点
、
、
、
为顶点的四边形是矩形,若存在,请直接写出所有符合条件的点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132de9682ce9a412b7b517aa209726ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004f416195fa2f209108bc50a1d1701b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec64482b56c6326cd251fbe7d781b3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764913d17f4fcfc04dcc61ebac0a82fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731c646c5122769b4b10362068d4b0dc.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/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/a71dbe86-e06f-4e0e-9088-0aa4261ec75d.png?resizew=240)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/7ae1798f-7123-446f-9560-dfabffef519a.png?resizew=239)
(1)求抛物线的函数解析式;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14386f745d6a5575370298f4379ae09f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e430f13f42cf2d44aa0f0e20b959684f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8aea5990d11349b7b501b0b6354eae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9939f0930a45c1dbe014816692dc6a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764913d17f4fcfc04dcc61ebac0a82fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731c646c5122769b4b10362068d4b0dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/a0ed1ec316bc54c37c4286c208f55667.png)
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名校
【推荐2】如图,在平面直角坐标系中,点O为坐标原点,抛物线
与x轴交于点A(1,0),点B(﹣3,0),与y轴交于点C,连接
,点P在第二象限的抛物线上,连接
、
,线段
交线段
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/d2adbf87-58de-42d2-9fcd-c630b80f7672.png?resizew=308)
(1)求抛物线的表达式;
(2)设:
的面积为
,
的面积为
,当
时,求点P的坐标;
(3)设:点C关于抛物线对称轴的对称点为点N,连接
,点H在x轴上,当
时,
①直接写出所有满足条件的所有点H的坐标;
②当点H在线段
上时,点Q是线段
外一点,
,连接
,将线段
绕着点Q逆时针旋转
得到线段
,连接
,直接写出线段
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc229acc8bf1a2047394bda863b1ea71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/d2adbf87-58de-42d2-9fcd-c630b80f7672.png?resizew=308)
(1)求抛物线的表达式;
(2)设:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f944f78358763be992bb3d55fff12f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29eaf0ed8d20d6cac5d614570a5e8267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369c6804b271b167a69d4493c72f319a.png)
(3)设:点C关于抛物线对称轴的对称点为点N,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee72adf71190d06ad169837066928e17.png)
①直接写出所有满足条件的所有点H的坐标;
②当点H在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc5e85fe4ed90ad3c50d0673a39fea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
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【推荐1】已知:如图,抛物线y=ax2+bx+6交x轴于A(﹣2,0),B(3,0)两点,交y轴于点C.
(1)求a,b的值;
(2)连接BC,点P为第一象限抛物线上一点,过点A作AD⊥x轴,过点P作PD⊥BC于交直线AD于点D,设点P的横坐标为t,AD长为d,求d与t的函数关系式(请求出自变量t的取值范围);
(3)在(2)的条件下,DP与BC交于点F,过点D作DE∥AB交BC于点E,点Q为直线DP上方抛物线上一点,连接AP、PC,若DP=CE,∠QPC=∠APD时,求点Q坐标.
(1)求a,b的值;
(2)连接BC,点P为第一象限抛物线上一点,过点A作AD⊥x轴,过点P作PD⊥BC于交直线AD于点D,设点P的横坐标为t,AD长为d,求d与t的函数关系式(请求出自变量t的取值范围);
(3)在(2)的条件下,DP与BC交于点F,过点D作DE∥AB交BC于点E,点Q为直线DP上方抛物线上一点,连接AP、PC,若DP=CE,∠QPC=∠APD时,求点Q坐标.
![](https://img.xkw.com/dksih/QBM/2018/4/5/1917408352591872/1918317548855296/STEM/539e7f47feff434abb5b5dd87863775d.png?resizew=417)
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【推荐2】如图,抛物线
经过
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361610314e9bb5580993bd17d66b629c.png)
两点,与
轴相交于点
,连接
、
.
(1)
与
之间的关系式为: ;
(2)判断线段
和
之间的数量关系,并说明理由;
(3)设点
是抛物线
上
、
之间的动点,连接
,
,当
时:
①若
,求点
的坐标;
②若
,且
的最大值为
,请直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43091dee99247e22161194ddb2222d29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361610314e9bb5580993bd17d66b629c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bcaceadc00d891e292c8bdff9e4ce64.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/8f504f4f-467a-4be1-8767-d8fe6b0e358a.png?resizew=145)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/184f0fd302bd2a46b461b8ae978df5b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a54902dd15666a7c2af6476dd00a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/b865379a-47ed-4cd5-82b2-727a50535848.png?resizew=151)
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较难
(0.4)
真题
【推荐1】如图,在平面直角坐标系中,抛物线
(a≠0)与x轴交于A、B两点,与y轴交于点C,且OA=2,OB=8,OC=6.
(1)求抛物线的解析式;
(2)点M从A点出发,在线段AB上以每秒3个单位长度的速度向B点运动,同时,点N从B出发,在线段BC上以每秒1个单位长度的速度向C点运动,当其中一个点到达终点时,另一个点也停止运动,当△MBN存在时,求运动多少秒使△MBN的面积最大,最大面积是多少?
(3)在(2)的条件下,△MBN面积最大时,在BC上方的抛物线上是否存在点P,使△BPC的面积是△MBN面积的9倍?若存在,求点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
(1)求抛物线的解析式;
(2)点M从A点出发,在线段AB上以每秒3个单位长度的速度向B点运动,同时,点N从B出发,在线段BC上以每秒1个单位长度的速度向C点运动,当其中一个点到达终点时,另一个点也停止运动,当△MBN存在时,求运动多少秒使△MBN的面积最大,最大面积是多少?
(3)在(2)的条件下,△MBN面积最大时,在BC上方的抛物线上是否存在点P,使△BPC的面积是△MBN面积的9倍?若存在,求点P的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2017/12/6/1832663413235712/1836750848704512/STEM/8de1d366d5654dcdbd2edb8d12ce3508.png?resizew=216)
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解答题-问答题
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【推荐2】如图,抛物线
经过
,
两点,与y轴交于点C,D为第一象限抛物线上的动点,连接AC,BC,DA,DB,DB与AC相交于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/13fe7df5-c562-42b3-ab3a-2ab67bea05b4.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/b2285bc3-9477-4278-a58c-e893f9b27df8.png?resizew=115)
(1)求抛物线的解析式;
(2)如图,设
的面积为
,
的面积为
,当
时,求点D的坐标;
(3)如图,过点C作
轴,点M是直线CF上的一点,
交抛物线于点N,是否存在以C,M,N为顶点的三角形与
相似?若存在,请直接写出点M的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceba6b11658f2cc227b1f550ba25c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/13fe7df5-c562-42b3-ab3a-2ab67bea05b4.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/b2285bc3-9477-4278-a58c-e893f9b27df8.png?resizew=115)
(1)求抛物线的解析式;
(2)如图,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.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/7345443d66f1a4400c2c016f38e83dc8.png)
(3)如图,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3202e0433aa5e3ebd7ea156f5357205c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f0a496d91ab96783ac789ac18c9f30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff36ac07c45c8d03cf3b7d8739c517ca.png)
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