text: for smart only? n^(n^(n^(n^.........n^2))) = 2   value of n = ?  n^n^2=2 n^n^n^2=2  etc. n=2^(1/2)       =sqrt(2)  if n=sqrt(2) for  n^(n^(n^(n^2))) = 2  n^(n^(n^(sqrt(2)^2))) = 2  n^(n^(n^(2))) = 2  n^(n^(sqrt(2)^2)) = 2  n^(n^(2)) = 2  n^(sqrt(2)^2) = 2  n^(2) = 2  n=sqrt(2)  and so on for any no of n's  we can generalise it n^(n^(n^(n^.........n^k))) = k n=k^1/k