Jika diketahui A = 7i – 6j, B = -3i + 12j, dan C = 4i – 4j Berapakah : A + B + C A – B A – C

Question

Fisika Diposting : 2017-11-08 Diupdate : 2017-11-08 siregarr61

Pertanyaan

Jika diketahui A = 7i – 6j, B = -3i + 12j, dan C = 4i – 4j Berapakah :
A + B + C
A – B
A – C

Answer 1

a + b + c
= (7-3+4)i + (-6+12-4)j
= 8i + 2j

a-b
= (7-(-3))i + (-6-12)j
= 10i - 18j

a-c
= (7-4)i + (-6-(-4))j
= 3i - 10j