Lemma
EasySequences & series
#997 · Algebra · Sequences & series

Sum of a geometric series

Find the sum of the first 7 terms of the geometric progression .

~2 minAnswer checked instantlygeometric seriessum

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. V. Geometrical Progression, Examples V.a, No. 1

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).