Question

1- Dados os vetores; A=2i+3j, B=6i-4j, C=-1+12j e D=-8i-2j

a)calcule as somas:
A+B, B+C, A+B+C, B-A-C

Answer 1

A+B= (2i+3j)+(6i-4j)
A+B= 8i-1j
B+C= (6i-4j)+(-1i+12j)
B+C= 7i+8j
A+B+C= (2i+3j)+(6i-4j)+(-1i+12j)
A+B+C= 7i + 11j