5 1 b 1 2 7 July 8, 2019 16 32 64 128 A 1 1 2 b 5 7 6 6 5 b 2 1 = 8 7 If a 1 1 2 b 5 7 6 A 3 5 b =- 1 7 c =- 1 2 5 7 - 1 2 2 5 1 b 5b (b – 1) (b + 1) B) 1 5