在空间四边形
中,
为
中点,
为
的中点,若
,则使
、
、
三点共线的
的值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.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/1ddbf6d8569fd03153a260137292644a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/81dea63b8ce3e51adf66cf7b9982a248.png)
22-23高二上·浙江·期中 查看更多[4]
浙江省七彩阳光联盟2022-2023学年高二上学期期中数学试题福建省厦门第二中学2022-2023学年高二上学期第二次阶段考(12月)数学试题(已下线)专题02 空间向量基本定理及其坐标表示压轴题(5类题型+过关检测)-【常考压轴题】2023-2024学年高二数学上学期压轴题攻略(人教A版2019选择性必修第一册)(已下线)专题03 空间向量基本定理4种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
更新时间:2023-07-21 16:19:00
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适中
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名校
解题方法
【推荐1】已知平面
内有四点
,且任意三点不共线,点
为平面
外一点,数列
为等差数列,其前
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,若
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___________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8e4ca6eecf08038a95574b95b38828.png)
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【推荐2】已知
为空间中任意一点,
、
、
、
四点满足任意三点均不共线,但四点共面,且
,则实数
的值为_________ .
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐1】在
中,各个顶点与对边中点连线,相交于一点,定义为三角形的重心
,此时易得
.类似在三棱锥
中,各个顶点分别与对面三角形的重心的连线,相交于一点,定义为三棱锥的重心G.若设
,
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____________ .(用
、
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表示)
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【推荐2】已知点
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内,从
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