Vector Addition Homework: Multiplying Vectors & Gaussian Elimination

[g.lemaitre]

Homework Statement

Homework Equations

The Attempt at a Solution

Do you see how 1 1 1 changes to 3 3 3. i know why gaussian elimination you can change any vector by multiplying it by anything you want. but for some reason i have difficulty believing that you're allowed to do that here. is that what they're doing? just multiplying that vector by 3 so as to facilitate the arithmetic. Or maybe they're multiplying both vectors by 3, so as to get rid of the 1/3, but that doesn't explain how the 1/3 gets on the left side of the parentheses.

 

[grzz]

There is nothing wrong with

(1 1 1) = (\frac{3}{3} \frac{3}{3} \frac{3}{3}) =\frac{1}{3}(3 3 3)

 

[g.lemaitre]

ok, thanks