vektor a = [3,2,1] , b = [x, -9,3] , c = [2,-4,4] . jika vektor a tegak lurus dgn vektor b, maka panjang vektor (b-c) = ...
Matematika
putrimlyn
Pertanyaan
vektor a = [3,2,1] , b = [x, -9,3] , c = [2,-4,4] . jika vektor a tegak lurus dgn vektor b, maka panjang vektor (b-c) = ...
1 Jawaban
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1. Jawaban abyandaffa11
a . b = 0
3x - 18 + 3 = 0
3x = 15
x = 5
b (5, -9, 3)
c (2, -4, 4)
b - c = (3, -5, -1)