(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)
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(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)(1-1/2001)+(1-2/2001)+(1-3/2001)+
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)
=2000-1/2000×(1+2+3+……+1999+2000)
=2000-1/2000×(1+2000)×2000/2
=2000-1000.5
=999.5
回答完毕
计算1001-1/2001-2/2001-3/2001-...-2001/2001
2001/1+2002/2+2001/3+2001/4+.+2001/2001
1/2001+2/2001+3/2001...+4000/2001+4001/2001
1/2001+2/2001+3/2001+4/2001+``````````+1999/2001+2001/2001用简便算法写过程
计算2001*2001 2002/2001+2003/1
1/2001+3/2001+5/2001+...+1999/2001怎么算?
1又1/2001+2又2/2001+3又3/2001+4又4/2001+.+2000又2000/2001
我不知道2001/1+2001/2+2001/3.+2001/4001怎么做
2001分之1+2001分之2+2001分之3+2004分之4+...+2001分之2001的简便法
2002*2001-2001*2000+2000*1999-.-3*2+2*1
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)
(-1/2)^2001+(1/2)^2000
(-1/2)^2001+(1/2)^2000=
计算:(-1/2)^2001+((1/2)^2000
2001分之1加2001分之2加2001分之3加2001分之4加…加2001分之2001简便运算5分钟内速度回答
2011/2001又2001/2002+1/2003
2001除以2001又2002分之2001+2003分之1
2003÷2001又2002分之2001-2001分之1