Question

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

A + B + C
A – B
A – C

Answer 1

Diketahui
A = 7i - 6j
B = -3i + 12j
C = 4i - 4j
Ditanya
a) A+B+C
b) A-B
c) A-C
Jawab
a)
A+B+C
(7i-6j)+(-3i+12j)+(4i-4j)
7i-6j-3i+12j+4i-4j
(7-3+4)i+(-6+12-4)j
8i + 2j
b)
A-B
(7i-6j)-(-3i+12j)
7i-6j+3i-12j
(7+3)i+(-6-12)j
10i - 18j
c)
A-C
(7i-6j)-(4i-4j)
7i-6j-4i+4j
(7-4)i+(-6+4)j
3i - 2j