Question

va rog mult ajutatima daca dau coroana!!!!!!!!

Answer 1

Desparti  inegalitatea  in  2
{1/5<(2n+1)/10=>2<2n+1  =.> 1,<2n =>n>1/2
{(2n+1)/10<3/4 =>8n+4<30  =>8n<26 =>n<14/4 =3,25
Deci  n∈{1,2,3}