OK, now, so there's an interesting thing to note, which is that we can use the usual product rule for derivatives with vector expressions, with dot products or cross products.
还有个很有趣的现象要注意一下,就是我们可以用乘积法则,对向量表达式求导,无论是点乘或叉乘。
2
The exhibition is China's enterprises to promote products, meet customers, trading orders reached a very important vector.
展览已是我国企业推介产品、结识客户、达成订货交易的一个非常重要的载体。
3
The calculation of an inverse matrix is a lot of work, but by using the properties of vector cross products we can simplify the calculations.