Q3 Let A be n × n matrix that has zeros on the main diagonal and ones everywhere else. Example of a 4 × 4 matrix of this type is given below 1 1 1 1 1 1 1 1 1 1 1 1 0.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter3: Groups
Section3.1: Definition Of A Group
Problem 35E: 35. A permutation matrix is a matrix that can be obtained from an identity matrix by interchanging...
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Q3
Let A be n x n matrix that has zeros
on the main diagonal and ones
everywhere else. Example of a 4 x 4
matrix of this type is given below
1
1
1
1
1
1
1
1
1
1
1
1
(За,
Compute det(A) and
A- for n = 2, 3, 4.
(3b,
Note that in the cases
2, 3, 4 the matrix A- has a
n =
6.
special structure (all the elements on
the diagonal are the same and all the
off-diagonal elements are also the
same). Guess a formula for A-! in
the general case (or arbitrary n) and
verify that your guess is correct by
checking that AA¬! = I.
Transcribed Image Text:Q3 Let A be n x n matrix that has zeros on the main diagonal and ones everywhere else. Example of a 4 x 4 matrix of this type is given below 1 1 1 1 1 1 1 1 1 1 1 1 (За, Compute det(A) and A- for n = 2, 3, 4. (3b, Note that in the cases 2, 3, 4 the matrix A- has a n = 6. special structure (all the elements on the diagonal are the same and all the off-diagonal elements are also the same). Guess a formula for A-! in the general case (or arbitrary n) and verify that your guess is correct by checking that AA¬! = I.
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