20-21高一·江苏·课后作业
解题方法
1 . 如图所示,在△ABC中,D,F分别是AB,AC的中点,BF与CD交于点O,设
,
,试用
,
表示向量
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac265febbf99dccf51aa0a2253e61f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18663288c2245e1febaa003e3b58f56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7f004f23ec3f968d885cb111aac4e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/6589fa99-9124-4899-8eb7-f061b58d6533.png?resizew=218)
您最近一年使用:0次
名校
解题方法
2 . 在
中,
.
为
的重心,试用
、
表示
;
(2)如图2,若点
在以
为圆心,
为半径的圆弧
上运动(包含
、
两个端点),且
,设
,求
的取值范围;
(3)如图3,若点
为
外接圆的圆心,设
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259414bba09b088ca98ed4c3fcee8197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f654198c1e01d97f1378b35d7c68ca.png)
(2)如图2,若点
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.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/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b631cd7917b0ac877f875e26c2b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adebff9fb726cd58eda1ef994890901.png)
(3)如图3,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d04286510bedf469f1a53160b21c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
您最近一年使用:0次
2021-07-19更新
|
730次组卷
|
6卷引用:江苏省连云港市东海高级中学2022-2023学年高一下学期学期第一次月考数学试卷
名校
解题方法
3 . 如图,在
中,
为线段
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2020/8/5/2521507743596544/2522544112263168/STEM/1cfb34ea-6231-444c-b4ea-671c1947bc84.png)
若
,求
,
的值;
若
,
,
,且
与
的夹角为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](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/1b461cbe5a345727bc752ef8a063cf7e.png)
![](https://img.xkw.com/dksih/QBM/2020/8/5/2521507743596544/2522544112263168/STEM/1cfb34ea-6231-444c-b4ea-671c1947bc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0541d2f886f0dd8c0844d5f868a1115.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/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9429e7879366222d76936c61063f9161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c697259f74c85aec46ec7d08b0d68836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e9067d3ca4fae88e071e39a3448004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680b47e9eb79fe5fb05e1df373a8cdd3.png)
您最近一年使用:0次
2020-08-07更新
|
1005次组卷
|
21卷引用:【新教材精创】9.2.2 向量的数量积 练习
(已下线)【新教材精创】9.2.2 向量的数量积 练习2014-2015学年山东省滕州市第五中学高一上学期期末考试数学试卷2014-2015学年山东省临沭县高一下学期期中教学质量抽测数学试卷2018-2019学年高中数学人教A版必修四第二章平面向量单元测试【校级联考】湖南省岳阳一中、汨罗市一中2018-2019学年第二学期高一联考数学试题山东省新泰市第一中学2019-2020学年高一下学期期中考试数学试题江西省宜春市宜丰县第二中学2019-2020学年高一下学期月考数学试题湖南省益阳市2019-2020学年高一下学期期中数学试题江西省南昌市第十三中学等四校2020-2021学年高一年级上学期期末考试数学试题广东省茂名市华英外国语学校2020-2021学年高一下学期3月月考数学试题江西省莲花中学2020-2021学年高一下学期第一次月考数学试题湖南省长沙市雷锋学校2020-2021学年高一下学期第一次月考数学试题安徽省滁州市定远县育才学校2020-2021学年高一下学期第三次月考文科数学试题广东省广州市真光中学2021-2022学年高一下学期3月月考数学试题广东省广州市八十六中2021-2022学年高一下学期期中数学试题浙江省丽水市青田县船寮高级中学2021-2022学年高一下学期第二次月考数学试题安徽省芜湖市第一中学2018-2019学年高一下学期期中数学试题安徽省马鞍山市第二中学2022-2023学年高一下学期第一次教学质量检测数学试题安徽省淮北市第一中学2022-2023学年高一下学期第二次月考数学试题陕西省铜川市宜君县高级中学2022-2023学年高二下学期第一次月考数学试题河北省邯郸市鸡泽县第一中学2023-2024学年高二上学期开学考数学试题
名校
解题方法
4 . 如图所示
中
,
,
是
的重心,
边上的高为
,过
的直线与
,
分别交于点
,
,已知
,
.
(1)求
的值;
(2)若
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](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/826c728050e3378921442ace20269ef6.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4425dc7c346e4597c0521d7f636174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3605b320cae7b4a85aa273dfb7e606.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/55fa7f9a-44e0-400d-84da-0b80ede2fa03.png?resizew=156)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587b693b82241eb9c32cdbb96c209f33.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45373166e0a004b3b4d910655d409b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c6d5aeee562064b9bb703fa538413d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d2d153c31e0a4a9ca234ba3331590f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267661c8e1063b0d18dce70c5e6d1b5d.png)
您最近一年使用:0次
2023-05-20更新
|
223次组卷
|
2卷引用:江苏省南通市如东县等2地2022-2023学年高一下学期4月期中联考数学试题
名校
5 . 如图,扇形
所在圆的半径为2,它所对的圆心角为
,
为弧
的中点,动点
,
分别在线段
,
上运动,且总有
,设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/acd803c8-04ea-4926-8d97-7bc5379d9123.png?resizew=138)
(1)若
,用
,
表示
,
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e20d6fe4fea186b697f6456cb7c6ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9cb32a25c2a8bb99f75633b4cd5ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049131856ba841523793ee3d83099014.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/acd803c8-04ea-4926-8d97-7bc5379d9123.png?resizew=138)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c11a7ce3d62a7c0ddcb8397ecec00d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754ff99a252a251da4b9b3db4912f57d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c114400276606307388adbd66f4cb3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de88a91424dad8dbb931c2278f06598.png)
您最近一年使用:0次
2020-03-02更新
|
1014次组卷
|
4卷引用:江苏省宿迁市沭阳县2020-2021学年高一下学期期中数学试题
名校
6 . 如图,在矩形
中,
,
为
的中点,
是
边上靠近点
的三等分点,
与
于点
.设
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/79d11f0c-f286-4082-b8a0-6b504296d980.png?resizew=73)
(1)求
的余弦值;
(2)用
和
表示
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ecaea23c77bf54da0efcf95c463f0bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b54aa2b7f9adf409f0ce8e00615432.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/79d11f0c-f286-4082-b8a0-6b504296d980.png?resizew=73)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7d6902c8862bd2616be038549f77aff.png)
(2)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670f6533aaf27dd575f4f26e0c5928d9.png)
您最近一年使用:0次
2021-01-30更新
|
834次组卷
|
2卷引用:江苏省镇江市丹阳高级中学、南通市如皋中学2020-2021学年高一上学期期末联考数学试题
名校
7 . 如图,在△ABC中,D为BC的四等分点,且靠近点B,E,F分别为AC,AD的三等分点,且分别靠近A,D两点,设
=
,
=
.
(1)试用
,
表示
;
(2)证明:B,E,F三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d10782e6438dcdda6bd10e2aad31cc.png)
(2)证明:B,E,F三点共线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/83c60306-f044-4b7e-9a80-2d727a689e41.png?resizew=147)
您最近一年使用:0次
2018-08-22更新
|
1817次组卷
|
5卷引用:江苏省苏州市第三中学2020-2021学年高一下学期期中数学试题
20-21高一·江苏·课后作业
名校
解题方法
8 . 如图,在梯形ABCD中,
,
,
,G为对角线AC,BD的交点,E,F分别是腰AD,BC的中点,求向量
和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39282450bc4833027a7bdfa81c39f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f998bd3a389fd4ff986bddea52c6ac5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae54940f33b8714da5fe3b7546f8b3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538c1a9e933bc1e29d785eeda9cd1abc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/153e858b-79a5-4fcc-95d5-3950719d7c87.png?resizew=150)
您最近一年使用:0次
名校
解题方法
9 . 如图,平行四边形ABCD中,
,
,
,
分别是
,
的中点,
为
上一点,且
.
,
为基底表示向量
与
;
(2)若
,
,
与
的夹角为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca955515ebbe41a0b4a17dd55c94fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f837634b3ae1a977c1a43830178320c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558098da135bc12e7fdca05d14c3848e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bdf4646682d51d21ed781e862e88d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915b79e84c27685c804ad62a96272a4c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6316d995f00623f05fc3d56a6cbe5f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407538138dd68ab917925c2063cc98e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfd86a146fa6e26145d9a1d95ceb91b0.png)
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2020-05-08更新
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15卷引用:江苏省镇江市丹阳高级中学2020-2021学年高一(1-16班)下学期3月大练数学试题
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名校
10 . 已知
为
内一点,且满足
,延长
交
于点
.记
,
.
(1)试用
,
表示
;
(2)求
.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f452d678b6949f6acc0e6f45fec57a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1887a1513aee097a396e99d7399c4e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4851948ee018b0cf4e52b04f738f3f0.png)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864bc25cd8428dc1824dd4129632fe6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4b6d5a99320d3f4e499d39af54032e.png)
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2020-02-18更新
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