Question

(sqrt2^(sqrt2^(sqrt2....))))=x
Solving it via conventional method yields x=2 and 4.
How do I find out which one it is ?

Answer 1

http://openstudy.com/study#/updates/51310a1ce4b0ea4eb141c89e

Answer 2

@klimenkov I thought I recognized this question :P

Answer 3

I see.
I had forgotten about it completely. Thank you.

Answer 4

I had not visited this site for a year may be. I just looked at my old questions and read about these square roots. And at this moment I noticed asked question...
Coincidence???

Answer 5

woah! :O