如图①,在
中,动点P从点A出发以
的速度向点B运动,设运动时间为
,
,y与t的函数图象如图②所示,则图②中最低点M的纵坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f051275aa34c90fd6957973f6640753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1a48b92c61d209d0556e4cd8fdb70b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a80b46e3ef7314b35df0517c969608.png)
A.8 | B.10 | C.12 | D.14 |
更新时间:2024-05-08 13:15:48
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【推荐1】甲、乙两个工程队同时开始维修某一段路面,一段时间后,甲队被调往别处,乙队独自完成了剩余的维修任务.已知乙队每小时维修路面的长度保持不变,甲队每小时维修路面30米.甲、乙两队在此路段维修路面的总长度
(米)与维修时间
(时)之间的函数图象如图所示.
下列说法中:(1)甲队调离时,甲、乙两队已维修路面的总长度为150米;(2)乙一共工作2小时;(3)
;(4)甲队调离后
与
之间的函数关系式为
.
正确的有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
下列说法中:(1)甲队调离时,甲、乙两队已维修路面的总长度为150米;(2)乙一共工作2小时;(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e526795d48d373366be019529de868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46fcbabc06c0d07a8f6c184b06f4883.png)
正确的有( )个
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/10/7f99e0d2-df86-4cef-bf19-0a417dbc1bc3.png?resizew=196)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】二次函数
(
)的图象如图所示,下列结论:(1)![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782954844160/1573782960390144/STEM/84c158a6acc9452da60b0fe2c989f938.png)
(3)
(4)
其中不正确的有( )
![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782954844160/1573782960390144/STEM/59dd152caa5f4a46aa998e873bd2f6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de648cd39338d48f2d22eb82a77b4839.png)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782954844160/1573782960390144/STEM/84c158a6acc9452da60b0fe2c989f938.png)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782954844160/1573782960390144/STEM/15fb0053f75c48418a3c04dedc027424.png)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782954844160/1573782960390144/STEM/cd6df80f59344aa5b4e954b0789a85c3.png)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782954844160/1573782960390144/STEM/8e46a37b17984fa39ef60fe29c3de580.png)
![](https://img.xkw.com/dksih/QBM/2015/1/7/1573782954844160/1573782960390144/STEM/59dd152caa5f4a46aa998e873bd2f6fb.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐3】一天,小亮从家出发匀速步行去图书馆借书.几分钟后,在家休假的爸爸发现小亮忘带借书卡,于是爸爸骑自行车去追小亮,爸爸追上小亮以后以原速的一半回家.小亮拿到卡后以原速继续赶往图书馆,并从家出发后32分钟到达图书馆(小亮与爸爸交接时间忽略不计).两人相距的距离
(米)与小亮步行所用时间
(分钟)之间的函数关系如图所示,则下列说法错误 的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/7467f70e-4ff1-4a9b-a2b2-c2927639a936.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/7467f70e-4ff1-4a9b-a2b2-c2927639a936.png?resizew=196)
A.小亮的步行速度是40米/分 |
B.小亮爸爸回家的速度80米/分 |
C.小亮出发了10分后爸爸才出发 |
D.当爸爸回到家时,小亮离图书馆的距离是320米 |
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【推荐1】如图①,在矩形ABCD中,点M从点A出发以每秒1个单位长度的速度匀速运动到点B,点N沿A-D-C-B的顺序匀速运动,速度为每秒2个单位长度,当点M运动到点B时,M、N同时停止运动,设点M出发t秒时,△AMN的面积为S,如果S与t的函数关系如图②所示(其中0≤t≤2和6≤t≤8段为抛物线,2≤t≤6段为线段),那么下列说法不正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931332767817728/2934477807394816/STEM/e2e37c17-27fa-4ac1-a9d2-7562696c46c2.png?resizew=250)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931332767817728/2934477807394816/STEM/e2e37c17-27fa-4ac1-a9d2-7562696c46c2.png?resizew=250)
A.当点M运动到点B时,点N也运动到点B |
B.矩形ABCD的周长是12 |
C.当2≤t≤6时,S=2t |
D.当t=7时,S=7 |
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【推荐2】在
中,
,
,
为
边中点,
交
于点
,
、
分别在射线
、射线
上,当
经过点
时停止运动,连接
,过
作
且
,设
,
,
与
重合部分面积为
,
与
函数图象如图所示(
,
,
时解析式不同).则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
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A.4 | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在矩形ABCD中,AD=2,AB=4,分别以点B,D为圆心,以大于
BD的长为半径画弧,两弧相交于点E和F,作直线EF分别与DC,DB,AB交于点M,O,N、则MN的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/20309b41-e8e9-46e8-bfc2-b7ef486817a0.png?resizew=109)
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A.2.4 | B.![]() | C.2.5 | D.3 |
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名校
【推荐2】如图1,四边形
是平行四边形,连接
,动点P从点A出发沿折线
匀速运动,回到点A后停止.设点P运动的路程为x,线段
的长为y,图2是y与x的函数关系的大致图像,则平行四边形
的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/e3efe292-e605-4971-9815-d10adf764f1b.png?resizew=431)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a79092f7b8374b043c5eb25d27974c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/14/e3efe292-e605-4971-9815-d10adf764f1b.png?resizew=431)
A.![]() | B.![]() | C.![]() | D.36 |
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