6 7 x 2 3 9 July 8, 2019 16 32 64 128 7 6 1 9 x 3 2 6 3 5 x 2 7 9 6 x 7 3 2 x 9 4 3 2 1 3 x 6 7 x 9 10 11 9 7 6 x 2 1 3 9 2 19 6 x 7 3 67 5 6 phần x 3 9 2 x 7 X 2 3 y =- 5 6 z =- 7 9 X =- 2 3 y =- 4 6 z =- 7 9
