How to solve these?

1 ⤊

Number of NxN matrices possible with N integers such that
* each row and column have 1...N numbers
* matrix is symmetric over principal diagonal (TL to BR)

1 2
2 1

1 2 3
2 3 1
3 1 2

Any clues?
I am always eager to know how to solve these kind of problems.

2006-11-20 04:36:03 · 2 answers · asked by kp 3 in Computers & Internet ➔ Programming & Design

2 answers

Wrong category. Try this one in the mathematics category.

2006-11-25 02:18:20 · answer #1 · answered by Roasted Kiwi 4 · 1⤊ 0⤋

–3(x – 3) + 8(x – 3) = x – 9 distribute -3x + 9 + 8x - 24 = x - 9 integrate like words 5x - 15 = x - 9 subtract x for the two aspects 4x - 15 = -9 upload 15 for the two aspects 4x = 6 divide 4 for the two aspects x = 3/2

2016-12-29 06:27:07 · answer #2 · answered by Anonymous · 0⤊ 0⤋