概述
数量积问题中平面向量一般以有向线段形式或向量形式给出.本词条主要介绍以有向线段形式给出的数量积问题.如下例:
![](https://img.haomeiwen.com/i10782050/a9e6be2d6551679a.png)
解决方法
![](https://img.haomeiwen.com/i10782050/068db44fc2c245cb.png)
1基底法解决数量积问题
![](https://img.haomeiwen.com/i10782050/67b57bcffd8ce0fc.png)
步骤
![](https://img.haomeiwen.com/i10782050/14c941a1a84d958c.png)
![](https://img.haomeiwen.com/i10782050/fde2c202a046184e.png)
总结一下
![](https://img.haomeiwen.com/i10782050/2e6731a4cc57fb99.png)
2 坐标法解决数量积问题
![](https://img.haomeiwen.com/i10782050/2cbbb79911621be0.png)
步骤
![](https://img.haomeiwen.com/i10782050/29974739cf4912b8.png)
![](https://img.haomeiwen.com/i10782050/42f7e31db72fe7b0.png)
3 射影法解决数量积问题
![](https://img.haomeiwen.com/i10782050/3c7117b8e9749aa9.png)
![](https://img.haomeiwen.com/i10782050/078a25df8177e40f.png)
步骤
![](https://img.haomeiwen.com/i10782050/e774e6d058fdaf00.png)
![](https://img.haomeiwen.com/i10782050/92a35d1c8ed06483.png)
![](https://img.haomeiwen.com/i10782050/7898b3a13f8e1fc9.png)
小练习1
![](https://img.haomeiwen.com/i10782050/baae7109f1db4941.png)
解析
![](https://img.haomeiwen.com/i10782050/f3c6ce11a98f389e.png)
小练习2
![](https://img.haomeiwen.com/i10782050/6c58cffb051bcf77.png)
解析
![](https://img.haomeiwen.com/i10782050/1ca1ef87e34b3f78.png)
![](https://img.haomeiwen.com/i10782050/d2da63607d4b17c1.png)
小练习3
![](https://img.haomeiwen.com/i10782050/7d6a791aec634b47.png)
解析
![](https://img.haomeiwen.com/i10782050/add5efe135fae39c.png)
小练习4
![](https://img.haomeiwen.com/i10782050/190138bb0e839191.png)
小练习5
![](https://img.haomeiwen.com/i10782050/fb5d3822bad9eef8.png)
解析
![](https://img.haomeiwen.com/i10782050/95378b85633ee200.png)
数量积问题中平面向量一般以有向线段形式或向量形式给出.本词条主要介绍以有向线段形式给出的数量积问题.如下例:
解析
解析
解析
解析
本文标题:有向线段的数量积
本文链接:https://www.haomeiwen.com/subject/iurafftx.html
网友评论