linear algebra, 3.2 Q10 10. Let \( A \) be an \( m \times n \) matrix and \( B \) be an \( n \times p \) matrix. Prove that a. \( \mathcal{N}(B) \subset \mathcal{N}(AB) \).b. \( \mathcal{C}(AB) \subset \mathcal{C}(A) \). (Hint: Use Proposition 2.1.)c. \( \mathcal{N}(B) = \mathcal{N}(AB) \) when \( A \) is \( n \times n \) and nonsingular. (Hint: See the box on p. 12.)d. \( \mathcal{C}(AB) = \mathcal{C}(A) \) when \( B \) is \( n \times n \) and nonsingular.

Answered: 10. Let A be an m x n matrix and B be…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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linear algebra, 3.2 Q10

10. Let \( A \) be an \( m \times n \) matrix and \( B \) be an \( n \times p \) matrix. Prove that
a. \( \mathcal{N}(B) \subset \mathcal{N}(AB) \).
b. \( \mathcal{C}(AB) \subset \mathcal{C}(A) \). (Hint: Use Proposition 2.1.)
c. \( \mathcal{N}(B) = \mathcal{N}(AB) \) when \( A \) is \( n \times n \) and nonsingular. (Hint: See the box on p. 12.)
d. \( \mathcal{C}(AB) = \mathcal{C}(A) \) when \( B \) is \( n \times n \) and nonsingular.

Branch of mathematics concerned with mathematical structures that are closed under operations like addition and scalar multiplication. It is the study of linear combinations, vector spaces, lines and planes, and some mappings that are used to perform linear transformations. Linear algebra also includes vectors, matrices, and linear functions. It has many applications from mathematical physics to modern algebra and coding theory.

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