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vektor A = 4i + 3k
vektor B = 5i - 7j
vektor R = 6k
ditanyakan : (vektor P + vektor Q) . vektor R
Jawab Misalkan A = P dan B = Q
= (4i + 3k) + ( 5i - 7j) . 6k
= [(4 +5)i + 3k - 7j] . 6k
= [9i + 3k - 7j] . 6k
= 9i + 18k - 7j m