1/2001+2/2001+3/2001+4/2001+``````````+1999/2001+2001/2001
计算1001-1/2001-2/2001-3/2001-...-2001/2001
1/2001+3/2001+5/2001+...+1999/2001怎么算?
1/2001+2/2001+3/2001...+4000/2001+4001/2001
2002*2001-2001*2000+2000*1999-.-3*2+2*1
2001^3—2ⅹ2001^3—1999/2001^3 + 2001^2—2002
(1-1/2001)+(1-2/2001)+(1-3/2001)+······+(1-1999/2001)+(1-200
2000^2-1999*2001
2001*1999-2000^2
巧算(1/(2/3)/(3/4)/(4/5)/(5/6)/./(1999/2000)/(2000/2001)/(2001
1+2+3+...+1999+2000+2001+2002
利用分解因式计算2001³-2*2001²-1999/2001³+2001²-2
(2001立方-2*2001方-1999)/(2001立方+2001方-2002)