如图1,在
中,
,
,点P是
内一个动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/6119a3fd-ce77-49d2-b5c0-b7487445ba78.png?resizew=487)
(1)试找出与
相等的角,并说明理由.
(2)如图2,连接
并延长交
的外接圆
于点Q,交
于点D,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
①求证
;
②求
的最小值.
(3)在如图2的条件下,若
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942a9a6bde4a5b9803b68b1e9065de62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/6119a3fd-ce77-49d2-b5c0-b7487445ba78.png?resizew=487)
(1)试找出与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172766b458ea1e95ab1f5cd70bab7463.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4234cf4d8159f5df0333bcc269ffe099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
①求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d23d8614be566e6dd3a0c68ea15450.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac9bf5ac3d89d6847a585bf318b3ba8.png)
(3)在如图2的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f6f95e7b64ef2c99935ca58e44df645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074b9214844a7c8a0bca3d97e8c7a244.png)
23-24九年级上·浙江杭州·期末 查看更多[2]
更新时间:2024-03-09 11:28:50
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相似题推荐
解答题-问答题
|
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名校
【推荐1】综合与探究
二次函数
的图象与x轴交于
,
两点,与y轴交于点C,顶点为M.
(2)如图1,D是该二次函数图象的对称轴上一个动点,当BD的垂直平分线恰好经过点C时,求点D的坐标;
(3)如图2,P是该二次函数图象上的一个动点,连接OP,取OP的中点Q,连接QC,QM,CM,当
的面积为6时,直接写出点P的坐标.
二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358e2987096a67189bcc2a642da39524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8950c7bc835103d52ceffab14b6b31a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
(2)如图1,D是该二次函数图象的对称轴上一个动点,当BD的垂直平分线恰好经过点C时,求点D的坐标;
(3)如图2,P是该二次函数图象上的一个动点,连接OP,取OP的中点Q,连接QC,QM,CM,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51496e5f2d2f91c5c4aade9bc504ecfb.png)
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【推荐2】已知,
中,
,点
是
的边
上的点,且
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/e8faad2a-39bb-4118-8296-dc4b5d0fe445.png?resizew=426)
(1)如图1,若
,求证:
.
(2)如图2,
与
不平行,连接
,交
于点
.若
恰好垂直平分
,且
.请先找出图中所有与
相等的线段(不需另填字母),再进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/e8faad2a-39bb-4118-8296-dc4b5d0fe445.png?resizew=426)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1ac3ab8d3ce5e61fd2f89761f80976.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/2ac3d3b55561ec5d4acc242ecd1c7f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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解答题-作图题
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较难
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【推荐1】如图,在
中,
,点
在
上,
,连接
,点
是
上一点,
,过点
作
的垂线分别交
,
于
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/8d8adafd-9352-446b-a2dc-13a07013c7a7.png?resizew=218)
(1)依题意补全图形;
(2)
,求
的大小(用含
的式子表示);
(3)用等式表示线段
,
,
之间的数量关系,并证明.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc13fe21e64d9b45614ed43be847904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba49bdc393405451a4d66e60be8fb74.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/8d8adafd-9352-446b-a2dc-13a07013c7a7.png?resizew=218)
(1)依题意补全图形;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec66384de001ccfd86e935ddcfe1033d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)用等式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐2】如图1,在四边形
中,
,点
为线段
上一点,使得
,
,此时
,连接
,
,且
.
的长度;
(2)如图2,点
为线段
上一动点(点
不与
,
重合),连接
,以
为斜边向右侧作等腰直角三角形
.
①当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
时,试求
的长度;
②如图3,点
为
的中点,连接
,试问
是否存在最小值,如果存在,请求出最小值;如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac4b6e138df1ff677092e8aad75eb38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfd54e2fc770dd4053edcb973af1ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf5b86308e9f777a6611503ba8d0e9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09785a454d62cbbd2e16ed61ed172a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9466f26ee7c0db7a86de9eda0f881505.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4745d21979bb1e2a5c14e7eee49cc75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
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【推荐1】(1)如图1,正方形ABCD的边长为1,点E是AD边的中点,将△ABE沿BE翻折得到△FBE,延长BF交CD边于点G,则FG=DG,求出此时DG的值;
(2)如图2,矩形ABCD中,AD>AB,AB=1,点E是AD边的中点,同样将△ABE沿BE翻折得到△FBE,延长BF交CD边于点G.
①证明:FG=DG;
②若点G恰是CD边的中点,求AD的值;
③若△ABE与△BCG相似,求AD的值.
(2)如图2,矩形ABCD中,AD>AB,AB=1,点E是AD边的中点,同样将△ABE沿BE翻折得到△FBE,延长BF交CD边于点G.
①证明:FG=DG;
②若点G恰是CD边的中点,求AD的值;
③若△ABE与△BCG相似,求AD的值.
![](https://img.xkw.com/dksih/QBM/2012/1/13/1573329199063040/null/STEM/ba6ef4f82c8e419db1dbb12d75e02535.png?resizew=295)
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【推荐2】已知:△ABC是⊙O的内接三角形,AP平分∠BAC交BC于D,交⊙O于P,
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920507478319104/2970652160122880/STEM/1614cbfe-d5b6-4313-8bde-cd18dcdd1519.png?resizew=490)
(1)如图1,求证:
;
(2)如图2,G是
的中点,连接BG分别交AP、AC于E、F,连接BP,求证:BP=PE;
(3)如图3,在(2)的条件下,点H是EF上的一点,∠ABE+
∠PBD=45°,BE=4EH=4,∠BPH=45°,求AE的长.
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920507478319104/2970652160122880/STEM/1614cbfe-d5b6-4313-8bde-cd18dcdd1519.png?resizew=490)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6265ee2a725a2ef3d28bff6b7efe2273.png)
(2)如图2,G是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
(3)如图3,在(2)的条件下,点H是EF上的一点,∠ABE+
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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名校
【推荐1】【尝试探究】已知
中,
,点
是
的中点.作
,分别交
、
于点
、
,连接
.
(1)如图1,若
,求证:
①连接
,证明:
;
②证明:
:
(2)如图2,试探索②中的结论在一般情况下是否仍然成立;
【解决问题】(3)如图3,已知
中,
,
,
,点
是
的中点,过
、
两点的圆分别交边
、
于点
、
,连接
,则
面积的最大值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.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/e1167767fd847678ef279f3e637f2828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/7a5f1641947153c80b987320885a2b57.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/ee3ee904-eb45-42c0-8f2b-51c18aaaf910.png?resizew=139)
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f414a3f6126e0934f65b3711163f66.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32aa6645c528e98c15f9372381d70f62.png)
(2)如图2,试探索②中的结论在一般情况下是否仍然成立;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/9c223d03-af3d-45d4-933d-b6e1adf847b1.png?resizew=151)
【解决问题】(3)如图3,已知
![](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/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba70863115b0947e98214a7b2512167d.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】已知在平面直角坐标系
中,直线
分别交
轴和
轴于点
.
(1)如图1,已知
经过点
,且与直线
相切于点
,求
的直径长;
(2)如图2,已知直线
分别交
轴和
轴于点
和点
,点
是直线
上的一个动点,以
为圆心,
为半径画圆.
①当点
与点
重合时,求证: 直线
与
相切;
②设
与直线
相交于
两点, 连结
. 问:是否存在这样的点
,使得
是等腰直角三角形,若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.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/68e97ce15d7f2430baff3d6aea5ee61a.png)
(1)如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1d9218917d85a1dc19e60f076b8bfa.png)
(2)如图2,已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73854c64bb9e962d742205368a3acd3.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4b5a2ccac15d3015249bd19a1876f1.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2352fd3ab9597b8256a41675bc0404bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c262fad422f1690b3428a1c68bb6614b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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