1 2 x 3 formula July 8, 2019 16 32 64 128 1 x x 2 x 3 x n formula 1 x 2 x 3 x 4 series formula X 2 1 5 x 3 1 4 formula 1 x x 2 x 3 infinity formula 1 2 + 3 4 1 + 1 = 2 + 2 = 3
