Diketahui vektor p=3i+4j+mk daan q = 2i – 3j + 5k. jika p.q =4 nilai m adlah

P.q = 3×2 + 4x(-3) + mx5 = 6 – 12 + 5m = -6 + 5m

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