Ano ang cross product ng [2, 1, -4] at [-1, -1, 2]?

Ano ang cross product ng [2, 1, -4] at [-1, -1, 2]?
Anonim

Sagot:

#A X B = -2 hat i-hat k #

Paliwanag:

# A = 2,1, -4 #

#B = - 1, -1,2 #

#A X B = hat i (1 * 2-1 * 4) -hat j (2 * 2-4 * 1) + hat k (2 * (- 1) + 1 * 1) #

#A X B = hat i (2-4) -hat j (4-4) + hat k (-2 + 1) #

#A X B = -2hat i-0hat j-hat k #

#A X B = -2 hat i-hat k #