B =( 18 9x2 x 2 4 6 8 10 July 8, 2019 16 32 64 128 2) (9 - b)(b + 9) + (4 - b) ^ 2 = 0 4) (d - 10) ^ 2 + (4 - d)(d + 4) = 0 4) b_ 1 = 2/9 b_ n = 18 s_ n = 26 8/9
