Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
我有两个从原点 <2,1> 和 <3,7> 开始的向量。我想找到新的向量(蓝色),但它也必须从原点开始,但可以翻译到那个位置。怎么会发现呢?还是我做错了什么?
所需的蓝色向量是 (3,7) - (2,1) = (1,6)。
向量从哪里开始,无论是从原点还是其他地方,都需要解释。向量本身包含的只是方向和长度,而不是位置。
如果你看看这三个,你会很容易发现shorter red + blue = longer red。因此,blue = longer red - shorter red。
shorter red + blue = longer red
blue = longer red - shorter red