Calculate the sum of the first 8 terms of the geometric progression .

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

Calculate the sum of the first 8 terms of the geometric progression 5, 10, 20,…5,\,10,\,20,\ldots. (a) 255255 (b) 12751275 (c) 12801280 (d) 635635

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