Thanks, i also have a question other than part (b) above,
say if u,v,w is lin,indep
q=w-v+lu and l E R
show u,v,q is lin,indep.
I can see u,v,q is lin,indep if q=w-v+u
But what if the equaition at above with a l real number multiply by u in the equation?
If 3 vectors are independent, they they form a basis for a 3 dimensional space.And how do i find out if its form a basis of R^3