Răspuns :
[tex] 3^{257} \ \textgreater \ 3^{228} =[(3)^4]^{57}=(81)^{57};
2^{285}=(2^5)^{57} =32^{57}. [/tex]
Deci [tex] 3^{257} \ \textgreater \ 2^{285} [/tex]
Deci [tex] 3^{257} \ \textgreater \ 2^{285} [/tex]