1 2 4 - 1 2 1

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 46E
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Question

Find (a) a basis for the column space and (b) the rank of the matrix.

1
2
4
- 1
2
1
Transcribed Image Text:1 2 4 - 1 2 1
Expert Solution
Step 1

Given:

The matrix is

Algebra homework question answer, step 1, image 1

 

Step 2

To determine:

(a)

The basis of the given matrix

Algebra homework question answer, step 2, image 1

Step 3

Explanation:

The matrix is

Algebra homework question answer, step 3, image 1

Convert the given matrix in the row echelon form,

Add the first row in the second row of the matrix,

Algebra homework question answer, step 3, image 2

Divide row 2 by 4

Algebra homework question answer, step 3, image 3

Subtract row 2 multiplied by 2 from row 1

Algebra homework question answer, step 3, image 4

Here the first and second column are pivot columns

The basis for the column space is the pivot columns from the original matrix

Therefore, the basis for the column matrix,

Algebra homework question answer, step 3, image 5

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