综上所述,答案如下5.39.217.77:88980 H' d( c0 \& a
1O4=10 =1+2+3+4=10公仔箱論壇2 s; l( ^3 e9 d: l5 S
2O6= 20 =2+3+4+5+6=20tvb now,tvbnow,bttvb. g+ Q& a( a4 D" q0 _: O* C# b
3O5=12 =3+4+5=12+ w9 y& Z% Z; t% h
4O8=30 =4+5+6+7+8=30tvb now,tvbnow,bttvb* [2 N8 K* z+ Y4 e5 j
5O10=? =5+6+7+8+9+10=45 |