Let A and B be m x n matrices. Show that V = {x e R" : Ax = Bx} is a subspace of R".

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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linear algebra 3.1 Q5

**Problem Statement:**

5. Let \( A \) and \( B \) be \( m \times n \) matrices. Show that 

\[ V = \{ x \in \mathbb{R}^n : Ax = Bx \} \]

is a subspace of \( \mathbb{R}^n \).

**Explanation:**

This problem asks you to demonstrate that the set \( V \), defined by the solutions to the equation \( Ax = Bx \), forms a subspace within the vector space \( \mathbb{R}^n \). This involves checking if \( V \) satisfies the conditions of being non-empty, closed under addition, and closed under scalar multiplication.
Transcribed Image Text:**Problem Statement:** 5. Let \( A \) and \( B \) be \( m \times n \) matrices. Show that \[ V = \{ x \in \mathbb{R}^n : Ax = Bx \} \] is a subspace of \( \mathbb{R}^n \). **Explanation:** This problem asks you to demonstrate that the set \( V \), defined by the solutions to the equation \( Ax = Bx \), forms a subspace within the vector space \( \mathbb{R}^n \). This involves checking if \( V \) satisfies the conditions of being non-empty, closed under addition, and closed under scalar multiplication.
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