(1/2+1/3+…+1/2002)(1+1/2+1/3+…+1/2001)-(1+1/2+…+1/2002)(1/2+1/3+…+1/2001)那网址打不开的,我早就看过了
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 13:25:58
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简便运算(1-1/2002)+(1-1/2002*2)+(1-1/2002*3)+.+(1-1/2002*2001)+(1-1/2002*2002)(1-1/2002)+(1-1/2002*2)+(1-1/2002*3)+.+(1-1/2002*2001)+(1-1/2002*2002)
(1/2+1/3+…+1/2003)(1+1/2+…+1/2002)-(1+1/2+…+1/2003)(1/2+1/3+…+1/2002)=?
1+2+3+……2002+2003+2002+……+1=?
(1-1/2004)(1-2003)(1-2002)…(1-1/3)(1-1/2)
(1/2+1/3+..….十1/2002)(1+1/2+1/3+……+1/2001)-(1+1/2+1/3+……+1/2002)(1/2+1/3+……+1/2001)
计算:1+2+3+…+2002+2003+2002+…+3+2+1=?
1+2+3…+2002+2003+2002…+3+2+1=
(1+1/2)*(1+1/3)*(1+1/4)*(1+1/5)*……*(1+1/2002)简便计算
1/2*1/3+1/3*1/4+1/4*1/5+……1/2002*1/2003=1/2-1/3+1/3-1/4+1/4-.-1/2002+1/2002-1/2003
(1+1/2+1/3+…+1/2002)*(1/2+1/3+1/4+…+1/2003)-(1/2+1/3+1/4+…+1/2002)*(1+1/2+1/3+…+1/2003)
1×1 + 2×2 + 3×3 + …… + 2002×2002 = 2676679005,求 1×2 + 2×3 + 3×4 + …… + 2002×2003
2005-2004+2003-2002+2001……+3-2+1
1-2+3-4+……+2001-2002+2003
1-2+3-4+……+2001-2002,
1-2+3-4……+2001-2002
1-2+3……+2001-2002=
(1/2+1/3+…+1/2002)(1+1/2+1/3+…+1/2001)-(1+1/2+…+1/2002)(1/2+1/3+…+1/2001)那网址打不开的,我早就看过了
111…1222…2÷333…3=?(2002个1,2002个2,2002个3)