Find Critical point of f(u)=ue^(u^n )+ln√(u^n+n), n=1234.

(a) Find Critical point of f(u)=ue^(u^n )+ln√(u^n+n), Where n is your arid number for example if your arid number is 19-arid-1234 then n=1234.
(b) Find the increasing and decreasing of function given in part (a)