Homework Help: Linear Algebra

Posted by Victoria on Tuesday, May 1, 2012 at 9:41am.

Suppose that in a certain basis B = (x,y,z), vector u is: u = 2x+3y-z. Find a unit vector with the same direction as u.

Thank you

Linear Algebra - Damon, Tuesday, May 1, 2012 at 10:26am
|u| = sqrt (2+9+1) = sqrt(12) = 2 sqrt(3)

unit vector = ( 1/{2 sqt3} ) u

= (1/6) sqrt 3 (2i+3j-k)
Linear Algebra - Victoria, Tuesday, May 1, 2012 at 10:28am
how did you get (2+9+1)?

Thank you

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