What is the maximum value of x such that f(x) is finite?
I wrote a small paper on this for a 2nd year project. The aim was to give a 30 minute easy to follow seminar to our peers.
[Hope it answers your question] Note that this was only the handout for the seminar so it isn't conclusive. Also, it isn't the final draught (cant find it )so there may be a few mistakes
EDIT: Didn't realise which forum this was posted in and so thought you were asking for help
You would need to define the function differently for it to make sense over the range
Power towers are read from top to bottom e.g
Where on the left hand side of the not equal sign I have calculated correctly, from top to bottom, and on the right hand side I have calculated incorrectly, from bottom to top.
All right!... if power towers are to be read from top to bottom, then we can construct a sequence of functions of recursively defined as...
... and we define f(x) as...
Now we have three possibilities...
In this case for all is so that is...
In this case for all is so that is
In this case for all is but the limit (1) doesn't exist, so that is undefined. For demonstrate this you can easily demonstrate that ...
for n even, for n odd
Anywhere also in this case the answer to the question proposed by R.V. is ...