Question: (iii) [4 marks] Let A be an n X 1:: matrix with W as the column space. Show that the solution space of AATa: :

(iii) [4 marks] Let A be an n X 1:: matrix with W as the column space. Show that the solution space of AATa: : 0 is given by Wi. 7. Let W be a subspace of R". Recall (from Exercise 5 Q7) that W- = fu ER" | u is orthogonal to W} is also a subspace of Rn

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