4 2 7 х 1 3 4 July 8, 2019 16 32 64 128 4 2 7 x 1 3 4 4 2 7 1 3 4 2 7 8 х )+ 4 1 6 5 3 4 4 2 3x )- 7 3 x 1 )+ 4 4 1/2 + 1 1/3 4/7 х = 7 3/7