Should the answer be unique?

What is (2^0.5)^(2^0.5)^(2^0.5)...

Here is the solution.

Let it be x, then we get x=(2^0.5)^x. It seems it will lead x=2 or 4.

Should the answer be unique?

所有跟帖： 

• Here is a related link -yma16- ♂ (237 bytes) () 11/29/2009 postreply 13:30:03

• yes -haha2000- ♂ (22 bytes) () 11/30/2009 postreply 10:07:31

• I think you are right. Could you show -yma16- ♂ (201 bytes) () 12/02/2009 postreply 07:02:07

• 回复：yes -cowgg- ♂ (559 bytes) () 12/07/2009 postreply 17:50:29