For each of the following, give an example of a non-zero 4 x 4 matrix A (i.e. non-zero matrix means not all entries are zero) which satisfies the following conditions. I the matrix does not exist, state so and explain why. (a) A is upper triangular as well as lower triangular. (b) A is in row echelon form (REF) but not in reduced row echelon form (RREF). (c) A is symmetric as well as skew-symmetric. (d) A is a scalar matrix and also the identity.

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
Question
For each of the following, give an example of a non-zero 4 x 4 matrix A (i.e.
non-zero matrix means not all entries are zero) which satisfies the following conditions. If
the matrix does not exist, state so and explain why.
(a) A is upper triangular as well as lower triangular.
(b) A is in row echelon form (REF) but not in reduced row echelon form (RREF).
(c) A is symmetric as well as skew-symmetric.
(d) A is a scalar matrix and also the identity.
Transcribed Image Text:For each of the following, give an example of a non-zero 4 x 4 matrix A (i.e. non-zero matrix means not all entries are zero) which satisfies the following conditions. If the matrix does not exist, state so and explain why. (a) A is upper triangular as well as lower triangular. (b) A is in row echelon form (REF) but not in reduced row echelon form (RREF). (c) A is symmetric as well as skew-symmetric. (d) A is a scalar matrix and also the identity.
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Matrix Operations
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