Lemma
MediumSequences & series
#1042 · Algebra · Sequences & series

Sum of partial sums of GP

If denote the sum of terms of a G. P. whose first term is , and common ratio , find the sum of , , , ... .

~15 minAnswer checked instantlygeometric progressionsum of sums

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. V. Geometrical Progression, Examples V.b, No. 21

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