/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q9E If all the entries of a 7脳7聽ma... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 6: Q9E (page 308)

If all the entries of a 7脳7matrix A are 7, then detA must be 77.

Short Answer

Expert verified

Therefore, the given condition is not satisfied. So, it is false.

Step by step solution

01

Matrix Definition. 

Matrix is a set of numbers arranged in rows and columns so as to form a rectangulararray.

The numbers are called the elements, or entries, of the matrix.

If there are m rows and n columns, the matrix is said to be an 鈥�m by n鈥� matrix, written 鈥�m脳n.鈥�

02

To check whether the given condition is true or false.

If all the entries of a 7脳7 matrix A are the same, then, we can make the row zero.

Therefore, detA=0not, detA鈮�77.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Use Exercise 31 to find

det[1111112345149162518276412511681256625]

Do not use technology.

In an economics text11we find the following system:

[-R1R1-1-伪伪1-伪-1-伪2R2-R2-1-伪2伪][dx1dy1dp]=[00-R2de2].

Solve for dx1,dy1, and dp. In your answer, you may refer to the determinant of the coefficient matrix as D. (You need not compute D.) The quantitiesR1,R2and D are positive, and ais between zero and one. If de2is positive, what can you say about the signs of dy1and dp?

If is any noninvertible square matrix, then detA=det(rrefA).

For two invertible nxnmatrices A and B , what is the relationship between adj(A),adj(B),andadj(AB)?

Use Cramer's rule to solve the systems in Exercises 22 through 24.

23. |5x1-3x2=1-6x1+7x2=0|
See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Calculus

Read Explanation

Logic and Functions

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Decision Maths

Read Explanation

Pure Maths

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.