如图,已知
是
的直径,点
是
上一点,过点
作
的切线交
延长线于点
,
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/0a095bcd-285c-4612-95b6-ad8c60a9d6ff.png?resizew=110)
(1)求证:
平分
;
(2)若
,
,求
的半径.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b757706eee506a078fc25e3f33a70cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/0a095bcd-285c-4612-95b6-ad8c60a9d6ff.png?resizew=110)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee5c73b57f6b4241292ebc41e1f4ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
2023·云南·一模 查看更多[2]
更新时间:2023-03-05 15:40:38
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相似题推荐
解答题-证明题
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【推荐1】请阅读下列材料,完成相应的任务.
任务:
(1)上述材料中
的依据是______;
(2)如图2,在
中,
是
边上的中线,E是
上一点,延长
交
于点F,
,求证:
;
(3)如图3,在
中,D为边
的中点,已知
,
,
,请你直接写出
的长.
认识“倍长中线法” 中线是三角形中的重要线段之一,在利用中线解决几何问题时,常采用倍长中线法添加辅助线.所谓倍长中线法,即延长边上(不一定是底边)的中线,使所延长部分与中线相等,以便构造全等三角形,从而运用全等三角形的有关知识来解决问题的一种方法. 如图1,在 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
(1)上述材料中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b21a74651ca5ceb35fdaa6f4d1cf6c.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e59617707e98c3441445392333b491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1120e471627069e78a6733af07687684.png)
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】(1)若正整数
、
,满足
,求
、
的值;
(2)已知如图,在
中,
,
,点
在边
上移动(不与点
,点
重合),将
沿着直线
翻折,点
落在射线
上点
处,当
为一个含
内角的直角三角形时,试求
的长度.
![](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/6e4e26b676d9f74ec8a89619966f1be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)已知如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2020/3/28/2429110200885248/2432626105253888/STEM/a2568862f51e46e6a76b3dac69343886.png?resizew=113)
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【推荐1】如图,
是
的直径,点
是
上一点,
与过点
的切线垂直,垂足为点
,直线
与
的延长线相交于点
,弦
平分
,连接
.
(1)求证:
;
(2)若
,
,求线段
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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/1dc8ae6e-45b5-418e-94b8-6c99d4cc9f76.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8160c3245211ac6341d7bb1f3e7db9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2e59adb72e5bac676270c667b1a691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61601ecf8de47ed9b84ee59d65f8118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐2】如图,
内接于圆
,
为直径,作
交
于点
,延长
,
交于点
,过点
作圆
的切线
,交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/da674c3a-c3aa-4a6f-8868-ada09fd982b9.png?resizew=229)
(1)求证:
;
(2)如果
,
.
①求
的余弦值;
②求弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/da674c3a-c3aa-4a6f-8868-ada09fd982b9.png?resizew=229)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0175dc2b94c0825fc250da0a2ba648.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1496042c1d721cffd25053e997a9a97.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daebc8ac27b32eb46881840ea3da59f3.png)
②求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐1】已知矩形ABCD的一条边AD=8,将矩形ABCD折叠,使得顶点B落在CD边上的P点处,
(1)如图1,已知折痕与边BC交于点O,连接AP、OP、OA.若△OCP与△PDA的面积比为1:4,求边CD的长.
(2)如图2,在(1)的条件下,擦去折痕AO、线段OP,连接BP.动点M在线段AP上(点M与点P、A不重合),动点N在线段AB的延长线上,且BN=PM,连接MN交PB于点F,作ME⊥BP于点E.试问当动点M、N在移动的过程中,线段EF的长度是否发生变化?若变化,说明变化规律.若不变,求出线段EF的长度.
(1)如图1,已知折痕与边BC交于点O,连接AP、OP、OA.若△OCP与△PDA的面积比为1:4,求边CD的长.
(2)如图2,在(1)的条件下,擦去折痕AO、线段OP,连接BP.动点M在线段AP上(点M与点P、A不重合),动点N在线段AB的延长线上,且BN=PM,连接MN交PB于点F,作ME⊥BP于点E.试问当动点M、N在移动的过程中,线段EF的长度是否发生变化?若变化,说明变化规律.若不变,求出线段EF的长度.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/66f91e8e-1708-4222-a757-368c06928927.png?resizew=446)
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【推荐2】如图,在
中,
,
平分
交
于点
,将
绕点
逆时针旋转到
的位置,点
在
上,连结
交
于点
.
(1)求证:
;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f15ba851a0f65c271ec774095516f07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aa1da9eef031c9562154530cbafb33.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6c6426f8f8826f3f15e20fda9e1cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022365ed188bd800e0b8a2b4ec1e2303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/420a674c-ba10-49ad-b3b7-c3c6e2889b2c.png?resizew=135)
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【推荐3】定义:从三角形(不是等腰三角形)的一个顶点引出一条射线与对边相交,顶点与交点所连线段把这个三角形分割成两个小三角形,如果其中一个为等腰三角形,另一个与原三角形相似,我么就把这条线段叫做这个三角形的“华丽分割线”.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977116617441280/2978552448040960/STEM/28b981e2-61ab-4659-9764-286745d91c47.png?resizew=162)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977116617441280/2978552448040960/STEM/8832ac2c-eb9b-4ddd-9345-a84c0ae22faf.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977116617441280/2978552448040960/STEM/1289cd77-3a04-4189-afa0-e1573cde1fcc.png?resizew=164)
例如:如图1,AD把△ABC分成△ABD和△ADC,若△ABD是等腰三角形,且△ADC∽△BAC,那么AD就是△ABC的“华丽分割线”.
【定义感知】
(1)如图1,在
中,
,
AB=BD.求证:AD是
的“华丽分割线”.
【问题解决】
(2)①如图2,在
中,
,AD是
的“华丽分割线”,且
是等腰三角形,则
的度数是________;
②如图3,在
中,AB=2,AC=
,AD是
的“华丽分割线”,且
是以AD为底边的等腰三角形,求华丽分割线AD的长.
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977116617441280/2978552448040960/STEM/28b981e2-61ab-4659-9764-286745d91c47.png?resizew=162)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977116617441280/2978552448040960/STEM/8832ac2c-eb9b-4ddd-9345-a84c0ae22faf.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977116617441280/2978552448040960/STEM/1289cd77-3a04-4189-afa0-e1573cde1fcc.png?resizew=164)
例如:如图1,AD把△ABC分成△ABD和△ADC,若△ABD是等腰三角形,且△ADC∽△BAC,那么AD就是△ABC的“华丽分割线”.
【定义感知】
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e9e7c56e8eeda044fb55396088816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3cba540157ab8887b0fd6bf7cbc54f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
【问题解决】
(2)①如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca6fafd473fe3da3c3fc1d4fbc68dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
②如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,一次函数
(
≠
)的图象与反比例函数
(
)的图象交于A、B两点,与
轴交于C点,点A的坐标为(
,6),点C的坐标为(-2,0),且
.
(1)求该反比例函数和一次函数的解析式;
(2)求点B的坐标;
(3)利用图象求不等式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae279f545723ba947c20ddf04802afaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3768c4f2eaef441fb7bd98bd4a7a90d5.png)
(1)求该反比例函数和一次函数的解析式;
(2)求点B的坐标;
(3)利用图象求不等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bceeb7fda4721fd85f174c619a473b44.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/032ba7b5-5e07-405a-a79b-fc018bdf89b0.png?resizew=159)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,为了测量某建筑物BC的高度,小颖采用了如下的方法:先从与建筑物底端B在同一水平线上的A点出发,沿斜坡AD行走130米至坡顶D处,再从D处沿水平方向继续前行若干米后至点E处,在E点测得该建筑物顶端C的仰角为60°,建筑物底端B的俯角为45°,点A、B、C、D、E在同一平面内,斜坡AD的坡度
.根据小颗的测量数据,求建筑物BC的高度(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1852175af2bff405159bc6b574dcb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/d27b2e0f-2a12-4ef3-9351-2b72a9fa8787.png?resizew=202)
您最近一年使用:0次