solve this! 1 + 2 + 3 + 4 +5 + ...n= (a)(b) or (c)

If you add all infinite numbers in a series like 1 + 2 + 3 + 4 + 5 +⋯ what is the result?

here are the options:
a) infinity
b) -1/12
c) write your answer in reply....

After you have written your reply, hit the youtube explanation and search for 1 + 2 + 3 + 4 + 5 +... n....

MINDBLOWING!!!