[-3,5,-3]和[4,-11,11]的叉积是多少?

[-3,5,-3]和[4,-11,11]的叉积是多少?
Anonim

回答:

#vec C = 22i + 21j + 13k#

说明:

#“两个向量的叉积给出如下:”#

#vec A =(a,b,c)#

#vec B =(d,e,f)#

#vec C = vec A X vec B#

#vec C = i(b * f-c * e)-j(a * f-c * d)+ k(a * e-b * d)#

#“从而:”#

#vec C = i(5 * 11-11 * 3)-j(-3 * 11 - ( - 3 * 4))+ k(( - 3)*( - 11)-5 * 4)#

#vec C = i(55-33)-j(-33 + 12)+ k(33-20)#

#vec C = 22i + 21j + 13k#