空间解析几何里向量积用到了 i j k，这些是什么？为何 i*j=k，j*k=i？_百度知道
31 January 2025 admin
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i、j、k表示单位向量；向量叉乘符合右旋定理（向量的点乘得到一个数，而向量的叉乘得到一个向量，这个向量和原来的两个向量都垂直，你可以这么理解 你右手手掌打开，四指并拢，大拇指和其他四个分开。然后四指与前一个向量的发现一致比如a*b 四指与a方向一致，然后你四指向b方向捏，现在 ...
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