A classmate says, “Because the expression contains dots

MATHEMATICS · Subjective · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

A classmate says, “Because the expression 3+6+9+⋯+303 + 6 + 9 + \dots + 30 contains dots, it represents an infinite sum, and since it is a sum, it cannot be an arithmetic progression.” Identify and correct both misconceptions in this statement.

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