4x 9 1 2x July 8, 2019 16 32 64 128 9 4x 1 )/ 2x 15 4x 9 2x 1 146 9 4x =- 3 1 2x 12x 4x 4 9 1 2x 9 4x 1 * 9 3 2x 81 9 4x 2 1 4 2x 8 3 4x 9 18 1 2x 1 4x 9 1 2x 8 F 4x 9 2x 1 4x 9 1 3 2x 1 5 4x 2 3x 9 2x 1 4x 9 2 − 2x 1 2 9 4x 3 2x 1 graph 4x 1 2x 5 =- 9 4x 9 là bội của 2x 1