11 June 2018

• 19:3819:38, 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..."

4 June 2018

• 19:4619:46, 4 June 2018 diff hist +690 N 1978 AHSME Problems/Problem 13 Answer is (B): -2