4 1 9 а ) 8 5 9 9 2 9 July 8, 2019 16 32 64 128 4 1 9 а )+ 8 5 9 9 2 9 (4 1/9 - a) + 8 5/9 = 9 2/9 4 9-(-5 1+8 4)
