6 1 -1 -2 4 3 A = 1 -4 -2 2 2 1 3

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Question

Use a software program or a graphing utility to find (a) ∣A∣, (b) ∣AT∣, (c) ∣A2∣, (d) ∣2A∣, and (e) ∣A−1∣.

6
1
-1
-2
4
3
A =
1
-4
-2
2
2
1
3
Transcribed Image Text:6 1 -1 -2 4 3 A = 1 -4 -2 2 2 1 3
Expert Solution
Step 1

Given,

Algebra homework question answer, step 1, image 1

Step 2: (a)

To find |A|

By using technology follow below steps:

1) To enter the Matrix Editor, press [matrix](above the x inverse key).  The calculators contain predefined matrix variables labeled [A] through [J].

2) The “NAMES” column in the Matrix Editor is where we will choose a matrix after it has been created.  The “EDIT” column looks just like the “NAMES” column, except this is where we input or edit a matrix.  The “MATH” column contains special commands that only work with matrices, some of which we will discuss later.

3) Press the right arrow key twice over to the “EDIT” column.  Use the  up, down arrow keys to select a matrix name.  Let’s use [A] since it is already selected, so press ENTER

4) Calculator displays by default 1 by 1 matrix, change there to 4 by  4

5) Return to the Matrix Editor

 Notice that [A] now has the dimension of our matrix beside it.  

This is how we know that a matrix has already been entered into the calculator

6) Go to matrix editor select MATH and select first option of determinnat.

7) Go to matrix editor and select matrix A.

8) Press ENTER it will display the value of determinant as -312

Step 3: (b)

To find determinant of A transpose.

To find A transpose by interchanging rows and column

Follow the same procedure as above,

It give |AT| = -312

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