为保持室内空气的清新,某车间的自动换气窗采用以下设计,窗子的形状是六边形
,它可以看作是由一个矩形和等腰梯形组成的.通风口是一个倒立的等腰
,其顶点固定在矩形底边
的中点O上,横杆
在
和
两侧移动且保持与底边
平行.经测量,
,
与
之间的距离为2米,
米,
米,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/764678c8-3d78-4c7c-acc4-a5bdc4b4f408.png?resizew=281)
(1)设等腰
的底边上的高为x,结合图1和图2分别表示
并写出x的范围;
(2)横杆
在两侧滑动时,
有没有最大值?若有,请求出;若没有,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019c0405370c673e37b46c066eba839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c2f1b2622fca870a8db62118900b77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/499c1138294ecfbb0fd556802e08f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed9d8b3a08d8881a1edbd34c12c1c567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41aba1711910c6f533cc94319104f4fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33009b5b010bf8cfa9d5479645fb9b20.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/764678c8-3d78-4c7c-acc4-a5bdc4b4f408.png?resizew=281)
(1)设等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6f8b40bd8e45f999bffb7c8e4978c7.png)
(2)横杆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6f8b40bd8e45f999bffb7c8e4978c7.png)
更新时间:2024-03-02 08:08:31
|
相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】如图,二次函数
图象的顶点为
,其图象与
轴的交点
,
的横坐标分别为
,
,与
轴负半轴交于点
.
下列结论:①
;②
;③
;其中正确的是________;
若
是等腰直角三角形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7b847f3ea395e08fbe48000822e877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/29418e5014731850c55565b6bf47aa41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.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/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fbceb31f23d5aed2d178d4d407f751.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
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【推荐2】如图,计划用长为24米的篱笆(全部用完)围成一个矩形菜园,利用长为10米的墙或墙的部分为一边,同时矩形菜园中间两处也用篱笆隔开,设菜园中垂直于墙的篱笆长都为
米,平行于墙的篱笆长为
米(其中
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/eca7e3a5-0620-499b-a6ef-d50dbb5149ff.png?resizew=194)
(1)求
关于
的函数表达式以及
的取值范围;
(2)求出矩形菜园面积
的最大值.
![](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/4d38c10c8fe37cd8e1b24a7ad7a3472b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/17/eca7e3a5-0620-499b-a6ef-d50dbb5149ff.png?resizew=194)
(1)求
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)求出矩形菜园面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图:
,
在线段
上,
、
分别平分
和
,设
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/d4b93933-8d58-45d3-bfd3-d847b3fc25c3.png?resizew=197)
(1)求
和
的长;
(2)你能求出
的长度吗?若能,请写出推理过程;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c42b59b76eafbbe36f13b2daa60132c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2633a6f46b0847158eebb05c743561aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b299f5cddf9da033ec3a996f42ae54b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6139d95122a19c9899ffc439ef0efacc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/d4b93933-8d58-45d3-bfd3-d847b3fc25c3.png?resizew=197)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)你能求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐2】如图,
中,
,动点P从点B出发以
的速度向点C移动,同时动点Q从点C出发以
的速度向点A移动,其中一点到达终点后另一点也随之停止运动,设它们的运动时间为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/ee9d81a1-048a-4ad7-b512-a90e80589978.png?resizew=128)
(1)运动几秒时,
为等腰三角形?
(2)t为何值时,
的面积等于
面积的
?
(3)在运动过程中,
的长度能否为
?试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e16d78a1a69a9501cd69e134a24870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f09251dec02dc2419a5389cca8f136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1a48b92c61d209d0556e4cd8fdb70b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/ee9d81a1-048a-4ad7-b512-a90e80589978.png?resizew=128)
(1)运动几秒时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
(2)t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca8b26c3ad6d892590290a2304126bd.png)
(3)在运动过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
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