如图,直线
与x轴,y轴分别交于点
,B.点
是线段
上一点,作直线
.
(1)若
,求直线
的函数解析式;
(2)当
时,求
面积的取值范围;
(3)若
平分
,记
的周长为m,
的周长为n,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0075e7118525dfe64bd3adec230644e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109a293cef44f23e86e22c1a4cfcbbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff1033328015d549c45dd9df93cfb08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/255998eb-7817-4afe-a884-b3e73a6a9fe8.png?resizew=144)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2c8d96a1bfdc807dd5f51672d59b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daae8ec60b2b1f7577dee687247cebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3304bc1372275307dce0bf4e98b8f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72850427e83ff19a24305783e080b280.png)
2019·河北·一模 查看更多[6]
(已下线)【万唯】河北省2018-2019年初中学业水平数学模拟考题 《逆袭卷2》2019年河北省石家庄十八县模拟联考(一)数学试题2020年河北省沧州市青县九年级初中毕业考试数学试题(已下线)【万唯原创】2019年河北省中考数学逆袭卷-2019年河北省7成果检测卷(二)(已下线)【万唯原创】 函数图象与性质综合题·满分专练(一)湖南省永州市宁远县冷水镇上宜中学2021-2022学年八年级下期第三次月考数学试卷
更新时间:2020-02-07 23:38:15
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相似题推荐
解答题-问答题
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【推荐1】如图,在平面直角坐标系中,二次函数y=x2+bx+c的图象与x轴相交于点A、B,与y轴相交于点C,B点的坐标为(6,0),点M为抛物线上的一个动点.
(1)若该二次函数图象的对称轴为直线x=4时:
①求二次函数的表达式;
②当点M位于x轴下方抛物线图象上时,过点M作x轴的垂线,交BC于点Q,求线段MQ的最大值;
(2)过点M作BC的平行线,交抛物线于点N,设点M、N的横坐标为m、n.在点M运动的过程中,试问m+n的值是否会发生改变?若改变,请说明理由;若不变,请求出m+n的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/0b9183c9-0f92-48d0-8839-9aed8734e139.png?resizew=326)
(1)若该二次函数图象的对称轴为直线x=4时:
①求二次函数的表达式;
②当点M位于x轴下方抛物线图象上时,过点M作x轴的垂线,交BC于点Q,求线段MQ的最大值;
(2)过点M作BC的平行线,交抛物线于点N,设点M、N的横坐标为m、n.在点M运动的过程中,试问m+n的值是否会发生改变?若改变,请说明理由;若不变,请求出m+n的值.
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【推荐2】如图,在平面直角坐标系中,直线
分别与
,
轴交于点
,
,点
为线段
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/04eb902c-e778-41ec-9d83-67ebd452f675.png?resizew=384)
(1)求点
坐标及直线
的解析式;
(2)
为
轴上一个动点,当
时,求点
坐标;
(3)
为直线
上一个动点,
为坐标系内一点,当以
,
,
,
四个点为顶点的四边形是菱形时,直接写出点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f8e3e8f6da9ae94fdf525a8dfa4236.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/5963abe8f421bd99a2aaa94831a951e9.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/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9606a8526c82d8d64449c9515eb26e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/04eb902c-e778-41ec-9d83-67ebd452f675.png?resizew=384)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)
![](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/4dc7f54acef4e40aad465ffe5f8b4b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(3)
![](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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】【了解概念】对于给定的一次函数
(其中k,b为常数,且
),则称函数
为一次函数
(其中k,b为常数,且
)的关联函数.
【理解运用】例如:一次函数
,它的关联函数为
.
(1)点
在一次函数
的关联函数的图像上,则m的值为______;
(2)已知一次函数
.我们可以根据学习函数的经验,对一次函数
,它的关联函数为
的图像与性质进行探究.下面是小明的探究过程:
①填表,
②根据(1)中的结果,请在所给坐标系中画出一次函数
的关联函数的图像;
,则y的取值范围为______;
【拓展提升】
(3)在平面直角坐标系中,点M、N的坐标分别为
、
,连接
.直接写出线段MN与一次函数
的关联函数的图像有1个交点时,b的取值范围为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f386b47c8e5f31285ac389de5f05fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
【理解运用】例如:一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81041b4dd93923454a8f69da30d53249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c6c85755c0ec25a68cc7aaa6e46464.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fc07c18ccf7890726f5cd9c73f9da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81041b4dd93923454a8f69da30d53249.png)
(2)已知一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81041b4dd93923454a8f69da30d53249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81041b4dd93923454a8f69da30d53249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c6c85755c0ec25a68cc7aaa6e46464.png)
①填表,
x | … | ![]() | ![]() | 0 | 1 | 2 | … |
y | … | 5 | 3 | 1 | 3 | 5 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81041b4dd93923454a8f69da30d53249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a12a30935c79ae769818043a496f53.png)
【拓展提升】
(3)在平面直角坐标系中,点M、N的坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24f272ed1e35543babcb538a0bdd643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a634716f01416edf04b476e687002094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13653a89d3a38346e1ddf4fd1602f85.png)
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【推荐2】在平面直角坐标系xOy中,对于点P(x,y)和Q(x,y′),给出如下定义:
如果
,那么称点Q为点P的“关联点”.
例如:点(5,6)的“关联点”为点(5,6),点(﹣5,6)的“关联点”为点(﹣5,﹣6).
(1)如果点A(3,﹣1),B(﹣1,3)的“关联点”中有一个在函数
的图像上,那么这个点是 (填“点A”或“点B”).
(2)如果点N*(m+1,2)是一次函数y=x+3图像上点N的“关联点”,求点N的坐标.
(3)如果点P在函数y=﹣x2+4(﹣2<x≤a)的图像上,其“关联点”Q的纵坐标y′的取值范围是﹣4<y′≤4,那么实数a的取值范围.
如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278acc8813ce39e9f2249aa99a13455e.png)
例如:点(5,6)的“关联点”为点(5,6),点(﹣5,6)的“关联点”为点(﹣5,﹣6).
(1)如果点A(3,﹣1),B(﹣1,3)的“关联点”中有一个在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85410ff00c81839ff9a64bf86dc36f5e.png)
(2)如果点N*(m+1,2)是一次函数y=x+3图像上点N的“关联点”,求点N的坐标.
(3)如果点P在函数y=﹣x2+4(﹣2<x≤a)的图像上,其“关联点”Q的纵坐标y′的取值范围是﹣4<y′≤4,那么实数a的取值范围.
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【推荐3】问题:探究函数
的图象与性质.小斐根据学习函数的经验,对函数
的图象与性质进行了探究.下面是小斐的探究过程,请补充完整:
(1)在函数
中,自变量x的取值范围是______;
(2)下表是y与x的几组对应值.
①
______;
②若
,
为该函数图象上不同的两点,则
______;
(3)如图,在平面直角坐标系xOy中,描出以上表中各对对应值为坐标的点,并根据描出的点,画出该函数的图象,根据函数图象可得:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/2558dc16-7de8-4e68-b760-3ef7d24ae639.png?resizew=271)
①函数的最小值为______;
②请你写出该函数的另外一条性质:______.
(4)
,
为函数
图象上的任意两点,其中
,若对于
,都有
,请结合函数图象,直接写出a的取值范围______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcaff1c3d13407048107680ba75d317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcaff1c3d13407048107680ba75d317.png)
(1)在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcaff1c3d13407048107680ba75d317.png)
(2)下表是y与x的几组对应值.
x | … | 0 | 1 | 2 | 3 | … | |||
y | … | 1 | 0 | 0 | m | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965783eb09bd48dc88be12067c32e10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce5e3045adc5b1a129488cd00153d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(3)如图,在平面直角坐标系xOy中,描出以上表中各对对应值为坐标的点,并根据描出的点,画出该函数的图象,根据函数图象可得:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/2558dc16-7de8-4e68-b760-3ef7d24ae639.png?resizew=271)
①函数的最小值为______;
②请你写出该函数的另外一条性质:______.
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efcaff1c3d13407048107680ba75d317.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5120da38792c0c52a5f54cc7912e290f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
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解题方法
【推荐1】如图1,平面直角坐标系中,直线y=kx+b与x轴交于点A(6,0),与y轴交于点B,与直线y=2x交于点C(a,4).
(1)求点C的坐标及直线AB的表达式;
(2)如图2,在x轴上有一点E,过点E作直线
⊥x轴,交直线y=2x于点F,交直线y=kx+b于点G,若GF的长为3.求点E的坐标;
(3)在y轴上是否存在一点F,使以O、C、F为顶点的三角形是等腰三角形,若存在,直接写出点F的坐标;若不存在,说明理由.
(1)求点C的坐标及直线AB的表达式;
(2)如图2,在x轴上有一点E,过点E作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)在y轴上是否存在一点F,使以O、C、F为顶点的三角形是等腰三角形,若存在,直接写出点F的坐标;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694737641725952/2701118657093632/STEM/7cdc0f25-ce4f-47e7-a9fe-2cc10fbbfe42.png?resizew=320)
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【推荐2】某种型号的电热水器工作过程如下:在接通电源以后,从初始温度20
下加热水箱中的水,当水温达到设定温度60
时,加热停止;此后水箱中的水温开始逐渐下降,当下降到保温温度30
时,再次自动加热水箱中的水至60
,加热停止;当水箱中的水温下降到30
时,再次自动加热,……,按照以上方式不断循环.小宇根据学习函数的经验,对该型号电热水器水箱中的水温随时间变化的规律进行了探究,发现水温
是时间
的函数,其中
(单位:
)表示水箱中水的温度,
(单位:
)表示接通电源后的时间.下面是小宇的探究过程,请补充完整:
(1)小宇记录了从初始温度20
第一次加热至设定温度60
,之后水温冷却至保温温度30
的过程中,
随
的变化情况,如下表所示:
①请写出一个符合加热阶段
与
关系的函数解析式______________;
②根据该电热水器的工作特点,当第二次加热至设定温度60
时,距离接通电源的时间
为________
.
(2)根据上述的表格,小宇画出了当
时的函数图象,请根据该电热水器的工作特点,帮他画出当
时的函数图象.
![](https://img.xkw.com/dksih/QBM/2020/4/21/2446230314352640/2446961010761728/STEM/30d44c97e69d46e7b6740877a0d3f9b2.png?resizew=375)
(3)已知适宜人体沐浴的水温约为
,小宇在上午8点整接通电源,水箱中水温为20
,热水器开始按上述模式工作,若不考虑其他因素的影响,请问在上午9点30分时,热水器的水温______(填“是”或“否”)适合他沐浴,理由是_________________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11481dcf3bb5f472762e08bab4194cf4.png)
(1)小宇记录了从初始温度20
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
接通电源后的时间![]() ![]() | 0 | 2 | 4 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | … |
水箱中水的温度![]() ![]() | 20 | 30 | 40 | 60 | 51 | 45 | 40 | 36 | 33 | 30 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②根据该电热水器的工作特点,当第二次加热至设定温度60
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11481dcf3bb5f472762e08bab4194cf4.png)
(2)根据上述的表格,小宇画出了当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd029f6eb105ea3011e815d40020c45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d309a545ae8fd291c4a79e6b513b84.png)
![](https://img.xkw.com/dksih/QBM/2020/4/21/2446230314352640/2446961010761728/STEM/30d44c97e69d46e7b6740877a0d3f9b2.png?resizew=375)
(3)已知适宜人体沐浴的水温约为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4279e8afcd4b0ab497d36c195b34ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de96374212b9a5df820d78d10e7d1291.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
解题方法
【推荐1】如图,在矩形
中,点
是对角线
上一动点,连接
,作
分别交
于点
,
于点
.
(1)如图1,若
恰好平分
,求证:
;
(2)如图2,若
,取
的中点
,连接
交
于点
.
求证:①
;②
.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80125e48498ac9c548732e2af1b1758d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302efd5266f7868d8c67f7bb09dc2ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb996f0b3f75dddca8855fec50c1345.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c5dea129183a3f63433a5c53f0361e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
求证:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211637983e0dc4d2631a87355322745b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/113d2af27ec0d311f1c0b655925cd436.png)
![](https://img.xkw.com/dksih/QBM/2020/5/11/2460665985556480/2461271035092992/STEM/95c9b546-cf76-4243-8bb8-e3fec7f425cf.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】问题背景:如图(1),在
和
中,
,
,求证:
;
尝试应用:如图(2),在
和
中,
,
,连接
,点F是
的中点.判定以B,D,F为顶点的三角形的形状,并证明你的结论;
拓展创新:如图(3),在
中,
,
,将
绕点A逆时针旋转
得到
,连接
.若点E是
的中点,连接
,直接写出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5f6cb95e67eb160e4a8627a81c6e7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8abfdaab699cfe51bb9678110ad6aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b83407b7a590f1529162e79b8073a62.png)
尝试应用:如图(2),在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c2425db34d83dbe44f3ee3d2c5439b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a164a2233e24d114abf5c15047d97d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
拓展创新:如图(3),在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70cdea0a6320419afb4a69c086b58568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/955adbf9e41c9b02b6fd503330659186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1985812eaff9c01d050022078693fa.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次