Question What is the matrix P = (Pij) for the projection of R3 onto the subspace V spanned by the vectors ---L-- aj = 1-2 a2 = [-3] -3 |? [0] -1 Pu1 = Pi2 = P21 = P31 = What is the projection p of the vector b = onto this subspace? di =

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Transcribed Image Text: What is the matrix P = (Pij) for the projection of R3 onto the subspace V spanned by the vectors ---L-- aj = 1-2 a2 = [-3] -3 |? [0] -1 Pu1 = Pi2 = P21 = P31 = What is the projection p of the vector b = onto this subspace? di =
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Transcribed Image Text: What is the matrix P = (Pij) for the projection of R3 onto the subspace V spanned by the vectors ---L-- aj = 1-2 a2 = [-3] -3 |? [0] -1 Pu1 = Pi2 = P21 = P31 = What is the projection p of the vector b = onto this subspace? di =
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WOXW1V

Let a_(1)=[[2],[-2],[-1]]quada_(2)=[[-3],[-3],[0]]soutionA=[[2,-3],[-2,-3],[-1,0]] be the matrin with a_(1) and a_(2) as column.The projection matrix is P=A(A^(TT)A^(-1)*A^(TT):}{:[A^(TT)*A=[[2,-2,-1],[-3,-3,0]][[2,-3],[-2,-3],[-1,0]]],[=[[9,0],[0,18]]],[:'(A^(TT)A^(-1)=(1)/(ad-b)[[d,-b],[-c,a]]:}],[(A^(TT)*A)^(-1)=(1)/(162)[[18,0],[0,9]]],[P=A*(A^(TT)A)^(- ... See the full answer