b) Suppose a 6 × 8 matrix A has four pivot columns. What is the dim (Null A)? Is Col A = R* ? Explain.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.3: Spanning Sets And Linear Independence
Problem 42EQ
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I want b)

Q1) Answer the following
a) If a 7 x 5 Matrix A has rank 2, find dim(Null A), dim (Row A) and
rank AT
b) Suppose a 6 × 8 matrix A has four pivot columns. What is the dim
(Null A)? Is Col A = R* ? Explain.
c) If A is a 5 x 4 matrix, what is the largest possible dimension of the
row space of A? If A is a 4 × 5 matrix, what is the largest possible
dimension of the row space of A? Explain
Transcribed Image Text:Q1) Answer the following a) If a 7 x 5 Matrix A has rank 2, find dim(Null A), dim (Row A) and rank AT b) Suppose a 6 × 8 matrix A has four pivot columns. What is the dim (Null A)? Is Col A = R* ? Explain. c) If A is a 5 x 4 matrix, what is the largest possible dimension of the row space of A? If A is a 4 × 5 matrix, what is the largest possible dimension of the row space of A? Explain
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