The sum of the first 40 terms of an arithmetic progression is

MATHEMATICS · Multi-part · A Level · Mathematics · Sequences and series · Sequences and series

Problem

The sum of the first 40 terms of an arithmetic progression is 820820, while the sum of its first 10 terms is 130130. (a) Find the sum of the terms from the 11th to the 40th term. (b) Determine the common difference of the progression.

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