Jika p=[(1)(5)], q=[(−2)(4)] dan r=[(−3)(−1)]
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Question

Jika p=[(1)(5)], q=[(−2)(4)] dan r=[(−3)(−1)]
Carilah hasil operasi vektor dari: 2p+q

E. Aritonang · Accepted Answer

Jawaban yang benar adalah [(0) (14)].

Sifat :
Jika vektor a = [(x1) (y1)] dan vektor b = [(x2)(y2], maka :
k · a = [(kx1) (ky1)] dengan k = skalar
a + b = [(x1+x2) (y1+y2)]

p = [(1) (5)]
q = [(-2) (4)]
r = [(-3) (-1)]

2p + q = 2 [(1) (5)] +  [(-2) (4)]
= [(2·1) (2·5)] + [(-2) (4)]
= [(2) (10)] + [(-2) (4)]
= [(2+(-2)) (10+4)]
= [(0) (14)]

Jadi, 2p + q= [(0) (14)].

Jika p=[(1)(5)], q=[(−2)(4)] dan r=[(−3)(−1)] Carilah hasil operasi vektor dari: 2p+q