Hm.

vektor

perkalian skalar

a = 3i – j + 2k

a(3,-1,2)

b = 2i – 3j + k

b(2,-3,1)

a • b

= (3,-1,2) . (2,-3,1)

= 3.2 + (-1)(-3) + 2.1

= 11