6 7 9 1 2 3 July 8, 2019 16 32 64 128 7 * 9 x 2 3x 1 5 * 6 5 6 7 9 x 4 3 1 2 11 9 7 6 x 2 1 3 6 7 9 3 1 2 in fraction form 6 2 3x 1 )- 7 9 2 1 3n 6 =- 7 9 11 9 7 phần 6 x 2 1 3 1 3x 7 9 )( 6 5 3 2 x )= 0
