Question

Given A=2i+3j and B=4i-j

Compute for the following
a. |a|+|b|
b. 5A-6B
c. |5A-6B|
d. |5A|-|6B|

Answer 1

as you know, |ai+bj| is √(a^2+b^2)

and ai+bj + ci+dj = (a+c)i+(b+d)j

so what do you get?