解题方法
1 . 如图,梯形ABCD,
,
,E为BC的中点,F是AD上的任意一点,设
.
(1)当F是AD的三等分点时,试用向量
,
表示向量
;
(2)若
,求证:
的最小值与t无关.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef4e2976b194877ec06f84b04670cff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd0945da5f2f4bedb3f69eeb623f212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475ab01eb1221e8d4bb283d57a2f7194.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/19/bdd41a84-b6d5-4c14-9ebb-0e2247a41f83.png?resizew=170)
(1)当F是AD的三等分点时,试用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304a7f07db2ec637baadf8f0ab91c85c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c085dbb9d78aef7d81c3f4d6855f067b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc78f89939084f4979069d2d5b45833.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1dcbdf388fdf60a2e888f503c640961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebac1230346382e452057c7733a1b6b2.png)
您最近一年使用:0次
2 . 如图,在边长为1的正三角形ABC中,D为AB的中点,
,过点O的直线交边AB与点M,交边AC于点N.
,
表示
;
(2)若
,
,求
的值;
(3)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4f3cfeb930aa6221f7e01223a0db12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef2723673c90347f6dd58346278c7fa.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70fa908112806dc176b8abdc3b3aaa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a93a467f11c29aa3ec6124398b1c5a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27e62ba44cbfec6823ebc1f0c7457fb.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dfdcb46ca7d659aadac17e09fad3d65.png)
您最近一年使用:0次
名校
3 . 在
中,设
,若
,
与
交于点
,
![](https://img.xkw.com/dksih/QBM/2022/4/17/2959892772323328/2960305089503232/STEM/600919df-6987-486f-84bf-8869fab65c74.png?resizew=268)
(1)用
表示
;
(2)在线段
,
上分别取
,使
过
点,设
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ed0f18ec6f416353586da01adb3746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6022c2bff876964baa7263520ea0180f.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/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2022/4/17/2959892772323328/2960305089503232/STEM/600919df-6987-486f-84bf-8869fab65c74.png?resizew=268)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6799b234237333b0efa331d98f0374.png)
(2)在线段
![](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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644b06a0943aa192f1df6fd0126cdec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaacfaef44a654c0a1c283ef03fc0550.png)
您最近一年使用:0次
2022-04-17更新
|
994次组卷
|
6卷引用:浙江省台州市温岭中学2021-2022学年高一下学期3月月考数学试题
名校
解题方法
4 . 如图,在平行四边形ABCD中,
,
,
,BD,AC相交于点O,M为BO中点.设向量
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d5364f5e-51c8-4cdb-86f3-6ff65767cd32.png?resizew=180)
(1)求
的值;
(2)用
,
表示
;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a46dc0bb5d8fa33583817e530a5d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df45582a78652416cb16d803ec94362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf9fcb6abd253ff4fbd33df953564820.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d5364f5e-51c8-4cdb-86f3-6ff65767cd32.png?resizew=180)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc23a04cdac6439ea170e799f1c1df5.png)
(2)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/ddd6a3674943e99f6c1cc8296483bf32.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8be3b855464500d22726ae6225dcf9b.png)
您最近一年使用:0次
名校
解题方法
5 . 设向量
,
,
.
(1)当
时,以
为基底表示
;
(2)若
的夹角为锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea4d351bf083e6073f12845425fe6f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b1d05cac99e0e0ef08674191ce216b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911a64deb2ac610642951f7fe67584e3.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1625e24072a8fe6c277ecfca2c62cdaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20ec3efaa6b6ff5769e8999df5714a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d30cce70458cc9d72cb41c5f3a4f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2022-03-20更新
|
621次组卷
|
3卷引用:浙江省台州市椒江区书生中学2022-2023学年高一下学期3月月考数学模拟试题
名校
6 . 如图,在平行四边形
中,
、
分别在
、
上,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/01d2c812-8a9b-4e2c-8405-ee70e1a7860b.png?resizew=202)
(1)试用
、
表示
、
;
(2)若
,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa9c3b0d19ae046b55ca748249969a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be723fcc4b04649c592cafb01b39d5ae.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/2023/1/13/01d2c812-8a9b-4e2c-8405-ee70e1a7860b.png?resizew=202)
(1)试用
![](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/1597427446eb525d66724e2024476c45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/888afd002858f23a84a8755a002bed7a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57347a69920bc0db9e652a9141091ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2755b52f5dea899b730251050c7a21a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bee9fca9a88c33b1958e04d07166698.png)
您最近一年使用:0次
2021-07-25更新
|
570次组卷
|
3卷引用:浙江省台州市三门启超中学等两校2021-2022学年高一下学期期中联考数学试题
名校
7 . 如图在平行四边形
中,
,
,
,E为
的中点,H为线段
上靠近点E的四等分点,记
,
.
![](https://img.xkw.com/dksih/QBM/2020/11/7/2588054006882304/2590200485486592/STEM/c467413e-d00e-458d-83d5-062c8ba91086.png)
(1)用
,
表示
,
;
(2)求线段
的长.
![](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/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.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/4e7a93a1399ff7a2bde342652479241b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b54aa2b7f9adf409f0ce8e00615432.png)
![](https://img.xkw.com/dksih/QBM/2020/11/7/2588054006882304/2590200485486592/STEM/c467413e-d00e-458d-83d5-062c8ba91086.png)
(1)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/bfd0cecf5c102254b9755e42a80c3948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1dccb4ceaaaf4181461e6f457719ed.png)
(2)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
您最近一年使用:0次
2020-11-10更新
|
1059次组卷
|
7卷引用:浙江省台州市五校2018-2019学年高一下学期期中联考数学试题
名校
8 . 已知点
,
为坐标原点.
(1)若
,求
的值;
(2)若实数
满足
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b0b48f87b1cf5d25b590c60fa3dfb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12119a418505ce8c190c575a6de38bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a080cab44a7d3605430d67b207f9be.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ab8d9ec70b87c38a978f43d012eff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ccb9e2ad02134176b62c4b4b9b6cd92.png)
您最近一年使用:0次
2017-07-25更新
|
512次组卷
|
3卷引用:浙江省台州市书生中学2022-2023学年高二上学期起始考数学试题
12-13高一上·江苏南通·期末
9 . .已知平行四边形ABCD中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e077944613f71ee00a0c3e68a299bc7a.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7a68a3204c1a8d8d2b73536bd92210.png)
, M为AB中点,N为BD靠近B的三等分点.
(1)用基底
,
表示向量
,
;
(2)求证:M、N、C三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e077944613f71ee00a0c3e68a299bc7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7a68a3204c1a8d8d2b73536bd92210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
(1)用基底
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e783889356399be393c4ba9df940d10a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5f1bfc87664af732555b7924b6d7a2.png)
(2)求证:M、N、C三点共线.
![](https://img.xkw.com/dksih/QBM/2012/2/1/1570708370145280/1570708375502848/STEM/d345005a-7665-4fb2-ae17-ab9cd60bd836.png?resizew=304)
您最近一年使用:0次
2016-12-01更新
|
961次组卷
|
4卷引用:浙江省台州市玉环市玉城中学2021-2022学年高一上学期第一次月考数学试题
浙江省台州市玉环市玉城中学2021-2022学年高一上学期第一次月考数学试题(已下线)2011-2012学年江苏省南通市小海中学高一第一学期期末考试数学山西省潞城区第一中学校2020-2021学年高一下学期第一次月考数学试题山东省郯城第一中学2021-2022学年高一下学期4月质量检测数学试题