Let

(a) Find an LU-decomposition of A.
(b) Express A in the form A = L1DU1, where L1 is lower triangular with l's along the main diagonal, U1 is upper triangular, and D is a diagonal matrix.
(c) Express A in the form A = L2U2, where L2 is lower triangular with l's along the main diagonal and U2 upper triangular.

Transcribed Image Text:

1 _A=1-2-1