2 z 1 ) 3 z 1 )= 4 2z July 8, 2019 16 32 64 128 2 z 1 )+ 3 z 1 )= 4 2z Z-1 = z+1 2z-1 = z-2 1 2 + 3 4 2 3z + 4 1/2 * z - 1 4/5 * z + z = 25
