diketahui vektor u=(4,-3) v=(3,2) dan w=(2,-1) maka (-2u+3v).5w
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Pertanyaan
diketahui vektor u=(4,-3) v=(3,2) dan w=(2,-1) maka (-2u+3v).5w
1 Jawaban
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1. Jawaban 4452mot
Diketahui vektor u=(4,-3) v=(3,2) dan w=(2,-1) maka (-2u+3v).5w
-2u = -2(4, -3) = (-8, 6)
3v = 3(3, 2) = (9, 6)
5w = 5(2, -1) = (10, -5)
(-2u + 3v) = (-8, 6) + (9, 6) = (1, 12)
(-2u + 3v) × 5w = (1, 12) × (10, -5) = (10 - 60) = -40