如图1,在菱形
中,
,
,动点
从点
出发,以每秒
个单位的速度沿
的方向运动,到终点
停止:动点
在射线
上运动,且满足
,点
随点
停止终止运动.若
,
,设运动时间为
.请解答下列问题:
(1)请直接写出
,
与
之间的函数关系式及
的取值范围,并在图
所示的平面直角坐标系中画出该函数的图象;
(2)观察
的函数图象,写出该函数的一条性质;
(3)根据图象,直接写出
时
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3087da5c11909dab613378fee8d471fc.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67763319919ab282ca9327f55656a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48478f57bc46c65a0889ef5a4a6ef4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cb4c7d3f85150e340e3d342416d769e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb80b591b497d8d7a6d8592160de44.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/12/d5432e0b-6e1a-4160-82bd-4929f2d5ebbe.jpg?resizew=159)
(1)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/12/645c3509-364f-41b2-8209-b5c42e29bc3f.jpg?resizew=185)
(2)观察
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(3)根据图象,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86b0da538701c08fb214608e062372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
更新时间:2023-09-05 10:23:26
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知甲、乙两地相距90km,A,B两人沿同一公路从甲地出发到乙地,A骑摩托车,B骑电动车,图中DE,OC分别表示A,B离开甲地的路程s(km)与时间t(h)的函数关系的图象,根据图象解答下列问题:
(1)请用t分别表示A、B的路程sA、sB;
(2)在A出发后几小时,两人相距15km?
(1)请用t分别表示A、B的路程sA、sB;
(2)在A出发后几小时,两人相距15km?
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421324835315712/2421713524383744/STEM/3041d067bd8841c0949c88e288bd8837.png?resizew=215)
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【推荐2】一泳池清洗完毕后,用甲,乙两台不同的水泵同时向泳池内注水,一段时间后,甲水泵因故障停了一段时间,乙水泵继续注水,甲水泵维修完继续按原来的速度注水,从开始注水到结束共用90分钟,水池内水的总量为
(
)与放水时间
(分钟)之间的函数图象如图所示.
;
(2)求甲水泵维修完后,
与
之间的函数关系式;
(3)求泳池中的水量是所需水量的一半时,注水的时间是多少分钟;
(4)在整个注水过程中,哪台水泵注水较多,多多少立方米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36accab23dbd172687769aea43e5781c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36accab23dbd172687769aea43e5781c.png)
(2)求甲水泵维修完后,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)求泳池中的水量是所需水量的一半时,注水的时间是多少分钟;
(4)在整个注水过程中,哪台水泵注水较多,多多少立方米?
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【推荐1】如图①,在四边形
中,
,
,
.动点P从点
出发,沿
的方向以每秒
的速度匀速运动,在整个运动过程中,
的面积S与运动时间
的函数图象如图②所示.
__________;
(2)求点P在
段上运动时,
的面积S与运动时间
的函数表达式;
(3)当
的面积为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ee81929c987732fcb379802eeef7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd23cf0ee5cd9a31bd9923c03e2b159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
(2)求点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9202af84bc055b58bd51fae5e3272283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】如图,在△ABC中,AB=4cm.BC=5cm,P是
上的动点.设A,P两点间的距离为xcm,
B,P两点间的距离为
cm,C,P两点间的距离为
cm.
![](https://img.xkw.com/dksih/QBM/2020/5/25/2470442275110912/2470603472117761/STEM/3f6b6fce-93a5-4b96-bc73-edac86cab291.png)
小腾根据学习函数的经验,分别对函数
,
随自变量x的变化而变化的规律进行了探究.
下面是小腾的探究过程,请补充完整:
(1)按照下表中自变量x的值进行取点、画图、测量,分别得到了
,
的几组对应值:
(2)在同一平面直角坐标系xOy中,描出补全后的表中各组数值所对应的点(x,
),(x,
),并画出函数
,
的图象:
![](https://img.xkw.com/dksih/QBM/2020/5/25/2470442275110912/2470603472117761/STEM/fb42da65-1a3f-48ad-a0e2-2e60ba66a177.png)
(3)结合函数图象.
①当△PBC为等腰三角形时,AP的长度约为____cm.
②记
所在圆的圆心为点O,当直线PC恰好经过点O时,PC的长度约为_____cm.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae156a11e1eafcffd4335383202ca3e0.png)
B,P两点间的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f23323a6f00996487ca0e8638c08b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5af33867bce1c80c70275778225c610.png)
![](https://img.xkw.com/dksih/QBM/2020/5/25/2470442275110912/2470603472117761/STEM/3f6b6fce-93a5-4b96-bc73-edac86cab291.png)
小腾根据学习函数的经验,分别对函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f23323a6f00996487ca0e8638c08b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5af33867bce1c80c70275778225c610.png)
下面是小腾的探究过程,请补充完整:
(1)按照下表中自变量x的值进行取点、画图、测量,分别得到了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f23323a6f00996487ca0e8638c08b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5af33867bce1c80c70275778225c610.png)
x/cm | 0 | 1 | 2 | 3 | 4 |
![]() | 4.00 | 3.69 | 2.13 | 0 | |
![]() | 3.00 | 3.91 | 4.71 | 5.23 | 5 |
(2)在同一平面直角坐标系xOy中,描出补全后的表中各组数值所对应的点(x,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f23323a6f00996487ca0e8638c08b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5af33867bce1c80c70275778225c610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f23323a6f00996487ca0e8638c08b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5af33867bce1c80c70275778225c610.png)
![](https://img.xkw.com/dksih/QBM/2020/5/25/2470442275110912/2470603472117761/STEM/fb42da65-1a3f-48ad-a0e2-2e60ba66a177.png)
(3)结合函数图象.
①当△PBC为等腰三角形时,AP的长度约为____cm.
②记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae156a11e1eafcffd4335383202ca3e0.png)
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解答题-证明题
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适中
(0.65)
【推荐1】如图,在菱形
中,
是
的中点,连接
并延长,交
的延长线于点
.
;
(2)连接
,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3214c853ea2268ef6c434fb28f0298d.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3964296e7cd14a965b7c7a3b2878ed4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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解答题-证明题
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【推荐2】如图,在四边形
中,
,
,
,点E为
中点,射线
交
的延长线于点F,连接
.
是菱形;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78002bca853929365a3f58082f3e7637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211c130e20ea36d96e88927f88df956e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bc4c9dd737193f7acce692b23500d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,
是
斜边上的中线,以
为直径作
,分别交
、
于点
、
,过点
作
,交
于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/c425b471-9cf6-4d53-9351-32ba5a52cf3b.png?resizew=183)
(1)求证:
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9301ad0164a3b7cadacb775435a811c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/c425b471-9cf6-4d53-9351-32ba5a52cf3b.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
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解答题-证明题
|
适中
(0.65)
【推荐2】如图1,
为
直径,
为
上一点,
和过点
的切线互相垂直,垂足为点
,延长
至
.
平分
;
(2)如图2,若
,
,点
是半圆
的中点,连接
,
.
①求
;
②求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c99fc553ecb3e2afdb7058201bc642.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25fe7bf0ebb4320176041ebbd9707e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
①求
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