1 2a 4 10 July 8, 2019 16 32 64 128 1 2a 7 4 2a 3 a 10 2a 1 4 10 8 6a 1 2a 4 a 10 4 2a 1 )=- 10 a 5 1 - 2 = 4 1 + 2 + 3 + 4 = 10 1 2 + 3 4
