   Chapter 11.3, Problem 36E ### Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742

#### Solutions

Chapter
Section ### Algebra and Trigonometry (MindTap ...

4th Edition
James Stewart + 2 others
ISBN: 9781305071742
Textbook Problem

# SKILLS 3 5 − 3 8 Products Involving Matrices and Inverses The matrices A and B are defined as follows. A = [ − 1 0 2 0 − 2 − 1 4 2 1 ] B = [ 2 − 1 − 2 0 3 1 − 1 0 2 ] Use a graphing calculator to carry out the indicated algebraic operations, or explain why they cannot be performed. State the answer using fractions. (On a TI-83, use the Frac command to obtain the answer in fractions.) A B − 1

To determine

To find:

The matrix obtained by AB1 in fractions.

Explanation

Given:

The matrices are

A=B=

Calculation:

Press the Matrix key and right arrow to Edit on the screen.

Press Enter key to type the matrix in the calculator.

First, type the dimensions as 3×3,

Then, type the elements of the matrix as .

Press the Matrix key again and right arrow to Edit on the screen.

Press the down arrow and then press Enter key to type the second matrix in the calculator.

First, type the dimensions as 3×3,

Then, type the elements of the matrix as .

Press the Matrix key and then press 1 to obtain this saved matrix and then press Matrix key followed by 2 and x1 key to enter the inverse of second matrix

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