Tolong di bantuh jawab kak no 14

c = (a . b)/|b|² * b
c = ((11,-3,1) . (3,1,-2))/(akar(3² + 1² + (-2)²)² * (3,1,-2)
c = (33 - 3 - 2)/(akar14)² * (3,1,-2)
c = 28/14 (3,1,-2)
c = 2(3,1,-2)
c = (6,2,-4)
c = 6i + 2j - 4k

Jawaban E

Mapel : Matematika
Kelas : X SMA
Bab : Vektor

Pembahasan :
C = (a . b)/|b|² [b]
C = (11.3 + -3.1 + 1.-2)/[√(3² + 1² + (-2)²)]² [3 1 -2]
C = (33 - 3 - 2)/(9 + 1 + 4) [3 1 -2]
C = 28/14 [3 1 -2]
C = 2 [3 1 -2]
C = [6 2 -4]