Consider the following vectors of R^3: (1) := (1, 1, 0), (2):= (2,2,0), x(3) := (1, 0, 1), x(4) := (2, 1, 1), x(5):= (0,1,0). Determine the index set J:= {j E {1,...,5}:x() / span{x (1),...,x(i-1)}} Is (x():je) a basis of R^3?