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January 6th, 2016, 07:22 AM  #1 
Newbie Joined: Jun 2012 Posts: 12 Thanks: 0  determinant n by n matrix
A n by n matrix A is given by that the (kth row, lth collumn) entry =k+l. What is the determinant of this matrix? How to tackle this problem? I know how to do it for a specific n but how to do it leaving n as a variable for n= 3 I would get a matrix like below. (1+1) (1+2) (1+3) (2+1) (2+2) (2+3) (3+1) (3+2) (3+3) 
January 6th, 2016, 09:12 AM  #2 
Senior Member Joined: Dec 2013 From: Russia Posts: 327 Thanks: 108  

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