Što je križni proizvod [3, 0, 5] i [1,2,1]?

Što je križni proizvod [3, 0, 5] i [1,2,1]?
Anonim

Odgovor:

# ((3), (0), (5)) xx ((1), (2), (1)) = ((-10), (2), (6)) #, ili #-10,2,6#

Obrazloženje:

Možemo koristiti oznaku:

((3), (0), (5)) xx ((1), (2), (1)) = | (ul (hat (i)), ul (hat (j)), ul (hat (k))), (3,0,5), (1,2,1) | #

#:. ((3), (0), (5)) xx ((1), (2), (1)) = | (0,5), (2,1) | ul (šešir (i)) - | (3,5), (1,1) | ul (šešir (j)) + | (3,0), (1,2) | ul (šešir (k)) #

#:. ((3), (0), (5)) xx ((1), (2), (1)) = (0-10) ul (hat (i)) - (3-5) ul (hat (j)) + (6-0) ul (šešir (k)) #

#:. ((3), (0), (5)) xx ((1), (2), (1)) = -10 ul (hat (i)) +2 ul (šešir (j)) +6 ul (šešir (k)) #

#:. ((3), (0), (5)) xx ((1), (2), (1)) = ((-10), (2), (6)) #