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

P.q = 3x2 + 4x(-3) + mx5
= 6 - 12 + 5m
= -6 + 5m

p.q = 4
-6 + 5m = 4
5m = 4+6
5m = 10
m = 2

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