[bảng phiên âm] [YSN-663] [Maxim and Salma were asked to find an explicit formula for the sequence [54,63,72,81,unicode{0x2026}], where the first term should be [f(1)]. Maxim said the formula is [f(n)=54 9n]. Salma said the formula is [f(n)=9 54n]. Which one of them is right?] [%A7%B1%A7%E2%A7] [livro das praias do haiti ate caiena] [james wtndell terry] [Linh+khu+thời+mệnh+lý] [Bài+tập+đại+số+sơ+cấp] [苏宁易购] [lê bÃch]