T
trungduc2009


giai bpt sau
1+12^x < 3^x+4^x
:khi (122)::khi (122)::khi (122)::khi (122)::khi (122):
1+12^x < 3^x+4^x
:khi (122)::khi (122)::khi (122)::khi (122)::khi (122):
Last edited by a moderator: