Contact us
Choose a category below so we can get back to you as quickly as possible.
從結合律的公式來看,(a·b)是個數,囙此(a·b)·c的結果是一個向量,其方向和c一樣,而a·(b·c)算出的向量其方向是與a相同的,方向是不同的,囙此不滿足結合律.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.