微积分的UV求导公式是怎样推导出来的？

u)g'(v)约去，得到f''(u)g'(v)/[f'(u)g''(v)]=1/[f'(u)g''(v)]。最后，我们将上述等式两边同时乘以[f'(u)g''(v)]，得到f''(u)g'(v)/[f'(u)g''(v)]*[f'(u)g''(v)]=1。这就是UV求导公式：d/du(d/dv(f*g))=1。通过上述推导过程，我们得到了UV求导...