var ancestorid_140612='126167';
var isauth_140612='0';
var istop_140612='0';
var iselite_140612='0';
var iscommend_140612='0';
var islock_140612='0';
var title_140612='Re:请教高手一些排列组合题目~~';
var body_140612='第八题:2,3,3,4,8,()&nbsp;答案选A16<br><br>做法:第一项+第三项/2=第二项&nbsp;同理第二项+第四项/4=第三项---该数列规律为&nbsp;和数列/等比数列<br>得出答案为A<br><br>第9题选D对吗<br>';
var body1_140612='';
var sign_140612='<a href=http://club.sohu.com/main.php?c=216&b=zz0580&a=1828 target=_blank><img src=http://i3.itc.cn/20080703/4b3_fd63abac_2b84_4526_bcf1_406a60f433f1_0.jpg></a>';
var cn_140612='mingming0506@sohu';
var nickname_140612='亲近雅皮女生';
var inputdate_140612='2008-03-03 09:18:24';
var mobile_140612='1';
var Upassportid_140612='mingming0506@sohu.com';
var Usex_140612='2';
var Uartn_140612='719';
var Ueliten_140612='0';
var Ucommn_140612='0';
var Uloginn_140612='175';
var Ulinet_140612='31258';
var Uscore_140612='296';
var Upower_140612='131';
var Ulevel_140612='4';
var Urole_140612='30';
var Uwenji_140612='';
var Uavatar_140612='';
var avatartype_140612='';
var avatarstr_140612='e/5f';
var Uawatarkey_140612='3d687b60';