am nevoie urgent de exercitiul f va rog multtttttt

Răspuns:
lim (√x+2*√(x+1))/(3*√(x-1)+√(4*x+1))
x–>∞
=√x*(1+2*√(1+1/x))/(√x*(3*√(1-1/x)+√(4-1/x)))
= lim (1+2*√(1+1/x))/(3*√(1-1/x)+√(4-1/x))
x–>∞
= lim (3/0) = ∞.
x–>∞