diaonal, Tywne elow thie mair diagonal and on the diagonal above the main one. For example, 2 1] H2 = |1 2 2 1 Нз — | 1 2 1 1 2 1 2 1 1 2 1 0 H4 1 1 2 1 1 1 1 2 (1a) Use cofactor expansion along row 1 to show that |H4| = |H3| + |H2|- (1b) Optional Show that the same holds for arbitrary n > 3 |H„| = |Hn-1|+ |H,-2|. ||

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