wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Let A be a 3 × 3 square matrix, such that A (adj A) = 2 I, where I is the identity matrix. Write the value of |adj A|.

Open in App
Solution

We know that for a matix A of order n, A.adj A=AIn, where I is the identity matrix.Given: A.adj A=2IAI=2IA=2Now, adj A=An-1adj A=22=4

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Types of Matrices
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon