hej allihopa jag undrar om ni skulle kunna hjälpa mig med detta:
Let R4 have the euclidean inner product. Express
w=(-1,2,6,0) in the form W=w(1) + w(2) where w(1) is in the space W spanned by u1=(-1,0,1,2) and u2=(0,1,0,1), and w2 is orthogonal to W