3. Let 1 0 1 A = 3 1 2 4 1 3 (a) Find the determinant of A. (b) Is A invertible? Why or why not?

Algebra and Trigonometry (6th Edition)
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ChapterP: Prerequisites: Fundamental Concepts Of Algebra
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Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Linear Algebra
3.
Let
1 0 1
A= 3 1 2
4 1 3/
(a) Find the determinant of A.
(b) Is A invertible? Why or why not?
Transcribed Image Text:3. Let 1 0 1 A= 3 1 2 4 1 3/ (a) Find the determinant of A. (b) Is A invertible? Why or why not?
Expert Solution
Step 1: Condition for matrix to invertible

Given, A equals open square brackets table row 1 0 1 row 3 1 2 row 4 1 3 end table close square brackets

For matrix invertible, open vertical bar A close vertical bar not equal to 0.

Where open vertical bar A close vertical bar is determinant of matrix.

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