1 2x 9 2 July 8, 2019 16 32 64 128 1 2x 9 =- 25 1 2x 9 20 Y 1 2x 9 2 3 2x 1 9 27 1 2x 9 2x 2x 1 9 3x 2 10 3 2x 1 9 2 2x 1 9 x 2 3 0 2 3x 1 )-( 9 2x )= 25 5 1 2x )- 9 3x 24 2x 1 cosx 2sinx 9 3x 2 1 )( 2x 2 9 2x 1 x 2 9 27 1 2x 1 9 2 x 1 8x 9 =- 20 2x