My test is coming up real soon!
Need help with these questions.
Sorry for the rudeness ... tests make me... nervous...
Describe all vectors v = [x,y] that are orthogonal to u = [a,b].
And I really really need help understanding "span" in linear algebra. How do you determine if a vector is the span of a matrix?
prob) determine if the vector b is in the span of the columns of the matrix A.
prob) show that R^2 =
( , )
( , [-1])