如图,在平面直角坐标系中,矩形
的两边
、
分别在x轴、y轴的正半轴上,
,
.点P从点О出发,沿x物以每秒1个单位长度的速度向点A匀速运动,当点P到达点A时停止运动,设点Р运动的时间是t秒.将线段
的中点F绕点Р按顺时针方向旋转
得到点D,点D随点P的运动面运动,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/61ac5279-8104-403d-aeba-f35ea30b7305.png?resizew=150)
(1)点F和点D的坐标分别为:F__________,D___________(用含t的代数式表示);
(2)求当t为何值时,
的面积最大,最大面积为多少?
(3)在点P从点О向点A运动的过程中,
能否成为直角三角形?若能,求t的值;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bdcc2742be52cc80ba7dbe79f9a574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/5/61ac5279-8104-403d-aeba-f35ea30b7305.png?resizew=150)
(1)点F和点D的坐标分别为:F__________,D___________(用含t的代数式表示);
(2)求当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a9f49a7c376a6dea7ebcdb42cce2df.png)
(3)在点P从点О向点A运动的过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a9f49a7c376a6dea7ebcdb42cce2df.png)
更新时间:2023-03-13 14:41:05
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】海伦是古希腊数学家,约公元62年左右活跃于亚历山大,年轻时海伦酷爱数学,他的代表作《量度论》主要是研究面积、体积和几何分比问题,其中一段探究三角形面积的方法翻译如下:如图1,设三角形面积为
,以三角形各边为边向外作正方形,三个正方形的面积分别记作
、
、
,定义:
;
;
;
;
,经研究发现,
.如:三角形三条边分别为13、14、15,则
,
,
,
,
;
;
;
,所以
,故三角形的面积
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/22/d346a611-053e-4979-b1c8-bda6d12e193b.png?resizew=365)
(1)如图2,在
中,
,
,
,则
__________,
__________,
的面积
__________.
(2)在
中,若
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9285f5ae949fb3161bb247c4344bec09.png)
①若
的面积
,求
的值;
②若
的面积是否存在最大值?如果存在,请直接写出此时外接圆的直径,如果不存在,请简要说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23fcfd09ccca35f9f951fb4f8e7c2451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3d7fb06cc00e3b33d85f9832e83674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ebd4a88f805d1a036fea1e5524b6d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ef6b0895fe1ce3845e03cd0792dd9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215d395aa3aa87afdeb049b0cddfafc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071e9466dd974db3d19ddde943fb6cef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4384891523049b9ae438a218762789e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4847d2f6c6128a039333e2e4d2235057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71148c104abc89a4fdf81909917dd62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e18cc19109f18d53e936c3b45c4b8947.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55eef3cab0f760cd3e7d97c8d5440665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaabd5f8290c566056549963d414dd58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7d0d54e806192905957763d8a8b5d1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b706c222cc8774878476655ec7dda17.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/22/d346a611-053e-4979-b1c8-bda6d12e193b.png?resizew=365)
(1)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71cbe3cea00e2e1b5b2283c7626ffc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315b41eeea0dbaa395af2474c4ba6acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616d63f0903572bbffee41352b0076bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5908d9fa3f6f413fa4bac4b79629fed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/523a2d80f385f286c0c4fb3056a9b565.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac9fa82d5c6e06f26229bfab1826487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc97413880d85914af0d517a59de38e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9285f5ae949fb3161bb247c4344bec09.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2dd89c37b60b4596ac30e339aa0000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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名校
【推荐2】问题提出
(1)如图,在
中,
,D为
上一点,
,则
面积的最大值是______.
问题探究
(2)如图,已知矩形
的周长为
,求矩形
面积的最大值.
问题解决
(3)如图,
是葛叔叔家的菜地示意图,其中
米,
米,
米,现在他想利用周边地的情况,把原来的三角形地拓展成符合条件的面积尽可能大、周长尽可能长的四边形地,用来建鱼塘.已知葛叔叔欲建的鱼塘是四边形
,且满足
,你认为葛叔叔的想法能否实现?若能,求出这个四边形鱼塘周长的最大值;若不能,请说明理由.
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】在正方形
中,
为直线
上一动点(不与端点
重合),以
为直角边在
右侧作等腰直角三角形
连接
.
(1)如图①,当点
在线段
上时,线段
和
的数量关系为 ;
![](https://img.xkw.com/dksih/QBM/2020/4/18/2444048153182208/2444806863544320/STEM/4f969a9333b94c12adf0c0dadc54a7b5.png?resizew=206)
(2)如图②,当点
在线段
延长线上时,线段
和
之间又有怎样的数量关系?写出你的猜想,并给予证明;
![](https://img.xkw.com/dksih/QBM/2020/4/18/2444048153182208/2444806863544320/STEM/d6f186d570c84166aa87adaf854699a8.png?resizew=198)
(3)如图③,当点
在线段
反向延长线上时,且点
分别在直线
的两侧,请直接写出线段
和
的数量关系为 ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c667f3686c471945ac4a7fdc30ac086b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(1)如图①,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d497f088aa99c313fc04618af4877538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/4/18/2444048153182208/2444806863544320/STEM/4f969a9333b94c12adf0c0dadc54a7b5.png?resizew=206)
(2)如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d497f088aa99c313fc04618af4877538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/4/18/2444048153182208/2444806863544320/STEM/d6f186d570c84166aa87adaf854699a8.png?resizew=198)
(3)如图③,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d497f088aa99c313fc04618af4877538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/4/18/2444048153182208/2444806863544320/STEM/e37ce2d024c24b698be2b10455db9d14.png?resizew=241)
您最近一年使用:0次
解答题-问答题
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较难
(0.4)
名校
【推荐2】已知矩形
中,
,
,点
是边
的中点.
(1)如图,连接
并延长,与
的延长线交干点
,问:线段
上是否存在点
,使得
为等腰三角形,若存在,请求出
的长,若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105171034112/STEM/a6c31c8a-3a03-4a99-a589-91ccd2d19b3e.png?resizew=183)
(2)如图,把矩形
沿直线
折益,使点
落在点
上,直线
与
、
、
的交点分别为
、
、
,求折痕
的长.
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105171034112/STEM/01bd9eec-f2a1-42d3-937c-d002b7083768.png?resizew=210)
(3)如图:在(2)的条件下,以点
为原点、分别以矩形
的两条边
、
所在的直线为
轴和
轴建立平面直角坐标系,若点
在
轴上,在平面内是否存在点
,使以
、
、
、
为顶点的四边形是菱形?若存在,请直接写出点
的坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105171034112/STEM/53e1f569-5314-4c13-842e-44fa09625f54.png?resizew=271)
(4)如图:若点
为
边上的一个动点,连结
,以
为边向下方作等边
,连结
,则
的最小值是______.(请直接写出答案)
![](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/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(1)如图,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e29303195c563855aee4c14cbcb9bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105171034112/STEM/a6c31c8a-3a03-4a99-a589-91ccd2d19b3e.png?resizew=183)
(2)如图,把矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105171034112/STEM/01bd9eec-f2a1-42d3-937c-d002b7083768.png?resizew=210)
(3)如图:在(2)的条件下,以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.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/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105171034112/STEM/53e1f569-5314-4c13-842e-44fa09625f54.png?resizew=271)
(4)如图:若点
![](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/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52e1a61098688069dd7730d3eb7f91a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/2021/6/25/2750579279757312/2752105171034112/STEM/c58c7017-0931-4a3f-9e64-35eb9f744350.png?resizew=224)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐1】如图,在
中,
,
,
.点P从点A出发,以每秒2个单位长度的速度向终点B匀速运动,过点P作
交折线
于点D,连结
,将
绕点D逆时针旋转90°得到
.设点P的运动时间为t(秒).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/e8e2f2a5-3eee-41bb-a901-9df78853a3ab.png?resizew=163)
(1)
______.
(2)用含t的代数式表示线段
的长.
(3)当点E落在
边上时,求t的值.
(4)当
与
重叠部分为三角形时,直接写出t的取值范围.
![](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/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ee608882881caff2f1e223177424ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a52ef2a5f53a6d6aed3617b64b3d58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b17b75d6a83edb110f3dd91a5f40681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/e8e2f2a5-3eee-41bb-a901-9df78853a3ab.png?resizew=163)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
(2)用含t的代数式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(3)当点E落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(4)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在平面直角坐标系中,抛物线
(a为常数).
(1)当
在抛物线上,求m的值.
(2)当抛物线的最低点到直线
的距离恰好是
时,求a的值.
(3)已知
、
,连接
.当抛物线与线段
有交点时,记交点为P(点P不与A、B重合),将线段
绕点P顺时针旋转
得到线段
,以
、
为邻边构造矩形
.
①若抛物线在矩形
内部的图象的函数值y随自变量x的增大而减小时,求a的取值范围.
②当抛物线在矩形
内部(包含边界)图象所对应的函数的最大值与最小值的差为
时,直接写出a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f549a9aad634e983700f485688b81c1b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc54522d41acc269f74f50849e9987a.png)
(2)当抛物线的最低点到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb70fdf064b9193e506ca43f4672af56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/568e896d0cbf54daddec08afaf7e1aff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29643aeceee4f2ed42266d084d2f9153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0df17f5437fab0cfa1f0cb872e7e03.png)
①若抛物线在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0df17f5437fab0cfa1f0cb872e7e03.png)
②当抛物线在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0df17f5437fab0cfa1f0cb872e7e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】如图1,在正方形
中,
为边
上的动点(与点
不重合),点
在
的外接圆上,且在正方形
内部,
是
的中点,圆的半径为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/80ce020f-8921-4b20-98e9-e22fd9e1387d.png?resizew=417)
(1)证明
为等腰直角三角形
(2)如图2,连接
过点
作
于
,求
的长
(3)如图3,若
为
的一个四等分点,点
在
的外接圆上,
,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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f986c181183d8e7e45655e6c5b5d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/80ce020f-8921-4b20-98e9-e22fd9e1387d.png?resizew=417)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acb5e90dbcc3f3340916a3a11cc4612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7044476eb6e90a781518c230f4637bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2058ca6a9f448275b5cce997dc95650.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐2】如图1,
是
的直径,
是
上一点,
于
,
是
延长线上一点,连接
,
,
是线段
上一点,连接
并延长交
于点
.
是
的切线;
(2)若
,求证:
;
(3)如图2,若
,
,点
是
的中点,
与
交于点
,连接
.请猜想
,
,
的数量关系,并证明.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38389fab20a444875d7ec8dc6f41d90d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d645f44bf7e25138af62a0b279f2ff7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32aa376fbbd5e8c095d3062ad0350534.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69244eab6945872fb3405664be6e3109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91025a11418f1f8f41563fdc18d5ec39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次