lim x->+00  (ριζα χ²+2χ+3+χ)= 

=lim x->+00 (ριζα χ²(1+(2/χ)+(3/χ²)+χ)=

=lim x->+00 (χ*ριζα 1+(2/χ)+(3/χ²)+χ)= 

=lim x->+00 [χ(ριζα 1+(2/χ)+(3/χ²)+1)] = +00