(-1/2)^2001+(1/2)^2000
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(-1/2)^2001+(1/2)^2000
(-1/2)^2001+(1/2)^2000
(-1/2)^2001+(1/2)^2000
-1/2*(-1/2)^2000+(1/2)^2000
=-1/2(1/2)^2000+(1/2)^2000
=(1-1/2)(1/2)^2000
=(1/2)^2001
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
(-1/2)^2001+(1/2)^2000
(-1/2)^2001+(1/2)^2000=
计算:(-1/2)^2001+((1/2)^2000
1又1/2001+2又2/2001+3又3/2001+4又4/2001+.+2000又2000/2001
2002*2001-2001*2000+2000*1999-.-3*2+2*1
我不知道2001/1+2001/2+2001/3.+2001/4001怎么做
(1*1+2*2)/(1*2)+(2*2+3*3)/(2*3)+……+(2000*2000+2001*2001)/(2000*2001)
1*1+2*2/1*2+2*2+3*3/2*3+...+2001*2001+2002*2002/2001*2002
(1^2+2^2)/1*2+(2^2+3^2)/2*3+...+(2000^2+2001^2)/2000*2001+(2001^2+2002^2)/2001*2002
2001分之1+2001分之2+2001分之3+2004分之4+...+2001分之2001的简便法
(1/2+1/3+.+1/2000+1/2001)-(1+1/2+1/3+..+1/2001)(1/2+1/3+...+1/2000)1/2000+1/2001)-(1+1/2+1/3+..+1/2001)(1/2+1/3+...+1/2000)
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-2000/2001)
|1/2002-1/2001|+|1/2001-1/2000|+...+|1/2-1|
1+2+3+...+1999+2000+2001+2002