Diketahui vektor p = 3i + 4j + mk dan q = 2i - 3j + 5k. Jika p. q = 4, maka tentukan nilai m

VEKTOR

<== PERKALIAN SKALAR ==>

p•q = 4
(3, 4, m)•(2, -3, 5) = 4
3×2 + 4×-3 + m×5 = 4
6 - 12 + 5m = 4
-6 + 5m = 4
5m = 4+6
5m = 10
m = 10/5
m = 2

jadi nilai m = 2