如图,
中,
,
,
,
是线段
上一个动点,以
为边在
外作等边
.若
是
的中点,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/2020/5/6/2456906236788736/2457633499897856/STEM/ca082a21-2788-4f5e-ac62-b4c2e499d720.png?resizew=309)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/2020/5/6/2456906236788736/2457633499897856/STEM/ca082a21-2788-4f5e-ac62-b4c2e499d720.png?resizew=309)
A.6 | B.8 | C.9 | D.10 |
更新时间:2020-05-07 16:11:04
|
【知识点】 图形运动问题(实际问题与二次函数)解读
相似题推荐
单选题
|
较难
(0.4)
名校
【推荐1】在平面直角坐标系中,四边形OABC是矩形,点B的坐标为(4,3).平行于对角线AC的直线m从原点O出发,沿x轴正方向以每秒1个单位长度的速度运动,设直线m与矩形OABC的两边分别交于点M,N,直线m运动的时间为t(秒).设△OMN的面积为S,那么能反映S与t之间函数关系的大致图象是( )
![](https://img.xkw.com/dksih/QBM/2015/8/7/1573894034644992/1573894040379392/STEM/f3295849-3103-4ae2-867a-ec44bf29c4ea.png?resizew=222)
![](https://img.xkw.com/dksih/QBM/2015/8/7/1573894034644992/1573894040379392/STEM/f3295849-3103-4ae2-867a-ec44bf29c4ea.png?resizew=222)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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较难
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【推荐2】如图1,等腰
中,
,
,点D从点B出发,沿
方向运动,
于点E,
的面积随着点D的运动形成的函数图象(拐点左右两段都是抛物线的一部分)如图2所示,以下判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7012d1ff11db5e150182e19646814cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321370fe42bc1216902ea19fbd2a5979.png)
A.函数图象上点的横坐标表示![]() |
B.当点D为![]() ![]() |
C.两段抛物线的开口大小不一样 |
D.图象上点的横坐标为3时,纵坐标为![]() |
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