Wiskundeforum

Las laatst iets grappigs:
0.99999.... = 1
.....9999.0 = -1
..999.9999..= 0
https://en.wikipedia.org/wiki/P-adic_number

5-adisch:
-1 = .......444
i = .......12013233
-i = ......32431212

1 + 1 + 1......= -1/2
1 + 2 + 3......=-1/12
1 + 2 + 4......= -1
1 - 2 + 3 - 4......= 1/4
10 + 100 +1000.......=-1/9
1 - 1 + 2 - 6 + 24 - 120.... =