9 2x 1 27 x 2 July 8, 2019 16 32 64 128 9 * 81 1 2x 27 2 x 9 2x 3 1 27 x 2 3 27 x 2 =( 1 9 2x 4 1 81 (- x 9 2x =( 27 3x 2
