Jika a = i + 2j + 3k, b = -3i - 2j -k, c = i - 2j + 3k, maka 2a+b+c adalah..

2a + b + c
= (2,4,6) + (-3,-2,-1) + (1,-2,3)
= (0,0,8)
= 8k

Mapel : Matematika
Kelas : X SMA
Bab : Vektor

Pembahasan :
2a + b + c
= 2 [1 2 3] + [-3 -2 -1] + [1 -2 3]
= [2 4 6] + [-3 -2 -1] = [1 -2 3]
= [0 0 8]
= 0i + 0j + 8k
= 8k