________ x / x lim \/ x + 3 x->oo
Limit((x + 3^x)^(1/x), x, oo, dir='-')
3
________ x / x lim \/ x + 3 x->0+
3*E
= 8.15484548537714
________ x / x lim \/ x + 3 x->0-
8.15484548537714