Invent a 3 by 3 magic matrix M with entries 1,2,...,9. All rows and columns and
Chapter 1, Problem 1.4.61(choose chapter or problem)
Invent a 3 by 3 magic matrix M with entries 1,2,...,9. All rows and columns and diagonals add to 15. The first row could be 8, 3, 4. What is M times (1,1,1)? What is the row vector h 1 1 1i times M?
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