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Ch. P - Fundamental Concepts of Algebra
Blitzer - College Algebra 8th Edition
Blitzer8th EditionCollege AlgebraISBN: 9780136970514당신이 사용하는 게 아니라요?교과서 변경
1장, 문제 18

State the name of the property illustrated: (3 • 7) + (4 • 7) = (4 • 7) + (3 •7)

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Observe the given expression: \( (3 \cdot 7) + (4 \cdot 7) = (4 \cdot 7) + (3 \cdot 7) \). Notice that the two products are being added together on both sides.
Identify that the terms on the left side are \(3 \cdot 7\) and \(4 \cdot 7\), and on the right side, the same terms appear but in reversed order: \(4 \cdot 7\) and \(3 \cdot 7\).
Recall the Commutative Property of Addition, which states that changing the order of addends does not change the sum. In symbolic form, this is \(a + b = b + a\).
Since the expression shows the sum of two products with their order switched but the sum remains the same, this illustrates the Commutative Property of Addition.
Therefore, the property illustrated by the equation is the Commutative Property of Addition.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Commutative Property of Addition

The commutative property of addition states that changing the order of addends does not change the sum. For example, a + b = b + a. In the given expression, the sums on both sides have the same terms added in different orders, illustrating this property.
추천 영상:
5:36
Change of Base Property

Distributive Property

The distributive property connects multiplication and addition, stating that a(b + c) = ab + ac. Although the given expression resembles terms from distribution, it primarily shows rearrangement of terms rather than distribution itself.
추천 영상:
04:15
Multiply Polynomials Using the Distributive Property

Multiplication of Real Numbers

Multiplication of real numbers is commutative, meaning a × b = b × a. This allows factors to be reordered without changing the product, which is essential in understanding why (3 • 7) and (7 • 3) are equivalent in the expression.
추천 영상:
03:31
Introduction to Complex Numbers