Determine the first term and common difference of an arithmetic sequence where the…

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

Problem

Determine the first term and common difference of an arithmetic sequence where the sum of the first nn terms is given by Sn=∑r=1n(5r+11)S_n = \sum_{r=1}^{n} (5r + 11) .

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