1 + 8 = 3, 1 + 8 + 16 + 5, 1 + 8 + 16 + 24 = 7, 1 + 8 + 16 + 24 + ··········· + 8N (n is a positive integer)

1 + 8 = 3, 1 + 8 + 16 + 5, 1 + 8 + 16 + 24 = 7, 1 + 8 + 16 + 24 + ··········· + 8N (n is a positive integer)

The result of 1 + 8 + 16 + 24 + ······ + 8N (n is a positive integer) is (1 + 2n) &# 178;