So, I think my mind just broke. Why is the sum of all integers -1/12?

So, I think my mind just broke. Why is the sum of all integers -1/12?
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Answer :

answer:The video lost me about 40 seconds in then he made this leap from 1+2+3+4… to 1+ x2 + 2x squared and so on. That may be obvious to a mathematician, but to me it was a giant leap of faith. And logically it doesn’t make sense either. So I am just as confused as you are.
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