Diketahui v = (-1,-3), w = (4,-2), x = (5,-10), tentukan hasil dari a. 2v + 3w -x b. v. (W+x)
Matematika
shandyirawann
Pertanyaan
Diketahui v = (-1,-3), w = (4,-2), x = (5,-10), tentukan hasil dari
a. 2v + 3w -x
b. v. (W+x)
a. 2v + 3w -x
b. v. (W+x)
1 Jawaban
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1. Jawaban johannahelina
v = (-1,-3)
w = (4,-2)
x = (5,-10)
a. 2v + 3w - x
= 2(-1,-3) + 3(4,-2) - (5,-10)
= (-2,-6) + (12,-6) - (5,-10)
= (10,-12) - (5,-10)
= (5,-2)
b. v • (w + x)
= (-1,-3) • [(4,-2) + (5,-10)]
= (-1,3) • (9,-12)
= (-1 × 9) + (3 × -12)
= -9 + (-36)
= -45