=) Prove: If A is invertible, then det(A-1) = ) Prove: If A is inverible, then adj(A) is inve
=) Prove: If A is invertible, then det(A-1) = ) Prove: If A is inverible, then adj(A) is inve
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
![11.(a) Prove: If A is invertible, then det(A-) =
1
det(A)
(b) Prove: If A is inverible, then adj(A) is invertible and
[adj(A)]-
det(A)
1
A = adj(A¯). NOT allowed to use C
L
OType here to search](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1e4fcbe0-ed74-4447-b38a-a2af13f9fabc%2F1eccaa6e-1ab9-4a70-bf2c-67f264e46d7d%2Fw47uj2t_processed.jpeg&w=3840&q=75)
Transcribed Image Text:11.(a) Prove: If A is invertible, then det(A-) =
1
det(A)
(b) Prove: If A is inverible, then adj(A) is invertible and
[adj(A)]-
det(A)
1
A = adj(A¯). NOT allowed to use C
L
OType here to search
Expert Solution

Step 1
Introduction:
In the case of real numbers, the inverse of any real number a was the number , so that a multiplied by equaled 1. We knew that the inverse of a real number was the reciprocal of the number, as long as the number was not zero. The matrix is the inverse of a square matrix A, denoted by , such that the product of A and is the identity matrix. The resulting identity matrix will be the same size as matrix A.
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