1+2+22+23+24+····+22004=?
1+2+22+23+24+····+22004=?
1+2++3+··········+10000=
9·10·11·12·13·14·15·16·17·18·19·20·21·22·23·24·25·26·27·28号用
7+9+11······+21+23+25分之6+8+10······+20+22+24等于?
观察下列等式21=2,22=4,23=8,24=16,25=32,26=64,27=128·······观察规律说出第2
1、2·······
为了求1+2+2的平方+2的立方+····················2的2008次方 的值,可令S=
1/3+2/3=1,但0.333···+0.666···=0.999···,为神马?额······谁能解释一下·····
(1-2)×(2-3)×(3-4)×······×(19-20)=
(1)用像······似的······造个句子 (2)用像······一样······造一个句子
俗语和名句的填空1······,自知之明.2······,行必果.3工欲善其事,······.4临渊羡鱼,······.
1+2+3+4+5+6······38+39=?