向量a的模=3,b的模等于4,向量a+3/4b与a-3/4b的位置关系为解析上这样写(a+3/4b)×(a-3/4b)=a的模的平方-3/4b的模的平方等于0,所以向量a+3/4b与a-3/4b的位置关系为垂直.但是向量相乘不应该是a+3/4b的
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 20:16:51
![向量a的模=3,b的模等于4,向量a+3/4b与a-3/4b的位置关系为解析上这样写(a+3/4b)×(a-3/4b)=a的模的平方-3/4b的模的平方等于0,所以向量a+3/4b与a-3/4b的位置关系为垂直.但是向量相乘不应该是a+3/4b的](/uploads/image/z/1580926-22-6.jpg?t=%E5%90%91%E9%87%8Fa%E7%9A%84%E6%A8%A1%3D3%2Cb%E7%9A%84%E6%A8%A1%E7%AD%89%E4%BA%8E4%2C%E5%90%91%E9%87%8Fa%2B3%2F4b%E4%B8%8Ea-3%2F4b%E7%9A%84%E4%BD%8D%E7%BD%AE%E5%85%B3%E7%B3%BB%E4%B8%BA%E8%A7%A3%E6%9E%90%E4%B8%8A%E8%BF%99%E6%A0%B7%E5%86%99%EF%BC%88a%2B3%2F4b%EF%BC%89%C3%97%EF%BC%88a-3%2F4b%29%3Da%E7%9A%84%E6%A8%A1%E7%9A%84%E5%B9%B3%E6%96%B9-3%2F4b%E7%9A%84%E6%A8%A1%E7%9A%84%E5%B9%B3%E6%96%B9%E7%AD%89%E4%BA%8E0%2C%E6%89%80%E4%BB%A5%E5%90%91%E9%87%8Fa%2B3%2F4b%E4%B8%8Ea-3%2F4b%E7%9A%84%E4%BD%8D%E7%BD%AE%E5%85%B3%E7%B3%BB%E4%B8%BA%E5%9E%82%E7%9B%B4.%E4%BD%86%E6%98%AF%E5%90%91%E9%87%8F%E7%9B%B8%E4%B9%98%E4%B8%8D%E5%BA%94%E8%AF%A5%E6%98%AFa%2B3%2F4b%E7%9A%84)
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