0 7 x 4 2 July 8, 2019 16 32 64 128 7 7 0 х 4 2 0 7x =- 4 2 1 4 0 7 x 2 1 X 7 4 0 x 2 3 X 4 )( 2x 7 )= 0 0 28 x 4 7 X 7 4 ≥ 0 x 2 ≥ 3 0 2x 7 =- 0 3 x 4 X 4 6x 2 7 0 X 4 8x 2 7 0 3x 4 x 2 7 0 4 2 7 x 0 9 7 4 x 2 )- 3 x 1 )= 0