Answer
Deductive Reasoning
Work Step by Step
The Reasoning is based on a general formula of sum of first 'n' natural nos, it is not based on some specific example, so it is deductive reasoning.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 1 - Problem Solving and Critical Thinking - 1.1 Inductive and Deductive Reasoning - Exercise Set 1.1 - Page 12: 57
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