9 1 5 7 1 2 July 8, 2019 16 32 64 128 9 5 7 1 24 9 5 7 1 23 9 4 5 7 1 2 9 3 5 7 1 2 1 3 5 7 9 2n 1 formula 1 3 5 7 9 2n 1 sum formula 1 3 5 7 9 2n 1 7 1 2 х 1 5 9 9 4 5 7 1 2 as a mixed number 1 3 5 7 9 2x 1 225 1 3 5 7 9 2x 1 400 1 3 5 7 9 2x 1 9 2x 1 )= 5 3x 1 )- 7 1 3 5 7 9 2x 1 625
