#1002 · Algebra · Sequences & series

General geometric sum

Find a formula for the sum of the first $p$ terms of $1, 5, 25, \dots$ .

~3 minAnswer checked instantlygeometric seriesformula

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. V. Geometrical Progression, Examples V.a, No. 6

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