Use the following matrix to answer the question. A = What is the multiplicative identity of matrix A? a. b. C. d. e.

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,...
icon
Related questions
Topic Video
Question

Can you help me with the problem?

### Matrix Multiplicative Identity Problem

**Use the following matrix to answer the question:**

\[ A = \begin{bmatrix} 1 & \frac{1}{2} \\ 0 & -2 \end{bmatrix} \]

**What is the multiplicative identity of matrix A?**

a. \[ \begin{bmatrix} 0 & 0 \\ 0 & 0 \end{bmatrix} \]

b. \[ \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} \]

c. \[ \begin{bmatrix} -1 & -1 \\ 0 & 2 \end{bmatrix} \]

d. \[ \begin{bmatrix} -2 & -1 \\ 0 & 1 \end{bmatrix} \]

e. \[ \begin{bmatrix} 1 & \frac{1}{2} \\ 0 & -\frac{1}{2} \end{bmatrix} \]

**Explanation:**

In this exercise, you are asked to determine the multiplicative identity that, when multiplied by matrix \( A \), results in the identity matrix \( I \), which is:

\[ I = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} \]

Understanding the concept of the multiplicative identity is crucial in linear algebra for solving systems of equations, among other applications. Consider the choices above and compute the product of matrix \( A \) with each option to determine which satisfies the condition \( A \times I = I \times A = A \).
Transcribed Image Text:### Matrix Multiplicative Identity Problem **Use the following matrix to answer the question:** \[ A = \begin{bmatrix} 1 & \frac{1}{2} \\ 0 & -2 \end{bmatrix} \] **What is the multiplicative identity of matrix A?** a. \[ \begin{bmatrix} 0 & 0 \\ 0 & 0 \end{bmatrix} \] b. \[ \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} \] c. \[ \begin{bmatrix} -1 & -1 \\ 0 & 2 \end{bmatrix} \] d. \[ \begin{bmatrix} -2 & -1 \\ 0 & 1 \end{bmatrix} \] e. \[ \begin{bmatrix} 1 & \frac{1}{2} \\ 0 & -\frac{1}{2} \end{bmatrix} \] **Explanation:** In this exercise, you are asked to determine the multiplicative identity that, when multiplied by matrix \( A \), results in the identity matrix \( I \), which is: \[ I = \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} \] Understanding the concept of the multiplicative identity is crucial in linear algebra for solving systems of equations, among other applications. Consider the choices above and compute the product of matrix \( A \) with each option to determine which satisfies the condition \( A \times I = I \times A = A \).
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Knowledge Booster
Data Collection, Sampling Methods, and Bias
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, algebra and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
Algebra
ISBN:
9780134463216
Author:
Robert F. Blitzer
Publisher:
PEARSON
Contemporary Abstract Algebra
Contemporary Abstract Algebra
Algebra
ISBN:
9781305657960
Author:
Joseph Gallian
Publisher:
Cengage Learning
Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning
Algebra And Trigonometry (11th Edition)
Algebra And Trigonometry (11th Edition)
Algebra
ISBN:
9780135163078
Author:
Michael Sullivan
Publisher:
PEARSON
Introduction to Linear Algebra, Fifth Edition
Introduction to Linear Algebra, Fifth Edition
Algebra
ISBN:
9780980232776
Author:
Gilbert Strang
Publisher:
Wellesley-Cambridge Press
College Algebra (Collegiate Math)
College Algebra (Collegiate Math)
Algebra
ISBN:
9780077836344
Author:
Julie Miller, Donna Gerken
Publisher:
McGraw-Hill Education