2 6n 7 July 8, 2019 16 32 64 128 6n 2 7n 3 6n 2 7n N 2 6n 7 3n 2 6n 7 4n =- 2 6n 7 7n 2 6n 1 6n 2 72n 192 6n 2 72n 1 is divisible by 43 6n 2 7n 49 6n 2 7n 20 6n 2 7n 5 2 6n 6 ) - 72 N 2 6n 7 0 2 1 6n 7 Factor n 2 6n 7
