Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter1: Vectors
Section1.1: The Geometry And Algebra Of Vectors
Problem 29EQ: Write out the addition and multiplication tables for 4.
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Question
For the following, determine whether the binary operation ∗ defined is commutative and whether ∗ is associative and explain in detail:
(a) ∗ defined on Z be letting a ∗ b = a − b.
(b) ∗ defined on Q be letting a ∗ b = ab + 1.
(c) ∗ defined on Z + by setting a ∗ b = a b .
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