Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Review - Concept Check - Page 132: 2

Answer

(refer to the step-by-step part for the explanation) Examples in which the given property is used: (i) Commutative Property $2+3 = 3+2$; $2(3) = 3(2)$ (ii) Associative Property $2+(3+4) = (2+3)+4$; $2(3 \cdot 4) = (2\cdot 3)(4)$ (iii) Distributive Property $2(3+4) = 2\cdot3 + 2\cdot 4$

Work Step by Step

(i) Commutative Property The commutative property states that for any real numbers $a$ and $b$, (1) $a+b = b+a$ (for addition) (2) $a\cdot b= b \cdot a$ (for multiplication) Examples in which this property is used are: $2+3 = 3+2$ $2(3) = 3(2)$ (ii) Associative Property The associative property states that for any real numbers $a, b,$ and $c$, (1) $a+(b+c) = (a+b)+c$ (for addition) (2) $a\cdot (b \cdot c)= (a \cdot b) \cdot c$ (for multiplication) Examples in which this property is used are: $2+(3+4) = (2+3)+4$ $2(3 \cdot 4) = (2\cdot 3)(4)$ (iii) Distributive Property The distributive property states that for any real numbers $a, b, $ and $c$: $a(b+c) = ab+ac$ An example in which this property is used is: $2(3+4) = 2\cdot3 + 2\cdot 4$
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