1 7 9 * 5 2 3 July 8, 2019 16 32 64 128 7 * 9 x 2 3x 1 5 * 6 1 2 3 5 7 9 arithmetic sequence 1 7 9 х 2 2 5 1 3 5 7 9 2 3x 1 9x 5 3 1 3 5 9 y 7 2 1 x 25 x 6 x 7 9 2 5 3x 15 7 1 3 divided by 9 2 5 1 2 3 5 7 9 next number 2x 1 2 3x 7 9 5 18 1 2 (- 3x 9 )- 5 7 1 3 5 7 9 2 x 1 225 1 2 2x 6 )+ 5 2 3x 9 7 3x 2a2 9 1 7 )( 3a 5 2 5
