4 1 6x 2 7 July 8, 2019 16 32 64 128 6x 2 5x 4 )= 1 7 4x 3 4 4x 2 )+ 7 1 6x 3x 4 )( x 1 )( 6x 7 2 6 6x 4 7x 2 1 0 1 4 7 6x 2 7 5x 2x 1 4 6x 2 5 70x 6 40 1 2 6x 4 )-( 5x 7 )= 11 1 2 6x 4 )- 2 7x 3 )=- 29 2 6x 1 4 7x − 3 Y =- frac 1 4 x 2 + 6x 7 7x 4 1 2 38 6x 6 6x 2 1 ≥ 7x 4 5x 2 1 4 6x 5 3 )= 7 6