Question

I need to find the specified vector or scalar. I did it but I am not sure if I did it right. Thanks?!!

Answer 1

`||u+v||=2`

Explanation:

.
`u+v=-4i+4i+1j+1j=0i=2j=2j`

`||u+v||=sqrt(a^2+b^2)`

Our resulting vector od `ai+bj` is `0i+2j` which means:

`a=0` and `b=2`

`||u+v||=sqrt(0^2+2^2)=sqrt4=2`