#1019 · Algebra · Sequences & series

Three numbers in geometric progression

Three numbers form a geometric progression. Their product is $216$ and the sum of the products taken two at a time is $156$ . Find the three numbers.

~5 minAnswer checked instantlyGeometric progressionSymmetric sums

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. V. Geometrical Progression, Examples V.a, No. 25

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