User contributions
- 19:38, 11 June 2018 (diff | hist) . . (+401) . . N 1978 AHSME Problems/Problem 24 (Created page with "Let the geometric progression be <math>a,</math> <math>ar,</math> <math>ar^2,</math> so <math>a = x(y - z)</math>, <math>ar = y(z - x)</math>, and <math>ar^2 = z(x - y).</math...")
- 19:46, 4 June 2018 (diff | hist) . . (+690) . . N 1978 AHSME Problems/Problem 13 (Answer is (B): -2)