设非零向量a,b,c,d,满足d=(a*c)*b-(a*b)*c 证明a垂直于d
问题描述:
设非零向量a,b,c,d,满足d=(a*c)*b-(a*b)*c 证明a垂直于d
答
a*d=a*(a*c)*b-a*(a*b)*c
=(a*c)*(a*b)-(a*b)*(a*c)
=0
所以a垂直于d