Question: Please answer proof: Assume that the least squares error function is where, f (:ri), P2 (:ri) denote a function f and polynomial Of degree two

Assume that the least squares error function is where, f (:ri), P2 Please answer proof:

Assume that the least squares error function is where, f (:ri), P2 (:ri) denote a function f and polynomial Of degree two evaluated at discrete points for i = O, 1, 2, 3, 4. Then deduce At,'lx = Atb, where, t denotes transpose of A and A, x', b denote a matrix, least squares solution and solution vector, in that order. (101

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