1/3+1/(1+2)*(3+2)+1/(1+4)*(3+4)+.1/(1+2008)*(3+2008)
计算:|1/2-1|+|1/3-1/2|+|1/4-1/3|+...+|1/2009-1/2008|
1\(2\3)\(3\4)\.\(2007\2008)
1-(1/2-1/3)-(1/3-1/4).-(1/2007-1/2008)=?
1/1*2+1/2*3+1/3*4+1/4*5.+1/2007*2008+1/2008*2009=?
计算:(3+1)(3^2+1)(3^4+1)…(3^2008+1)-3^4016/2
计算:|1/2-1|+|1/3-1/2|+|1/4-1/3|+...+|1/2008-1/2007|+|1/2009-1
(-1*1/2)+(-1/2*1/3)+(-1/3*1/4)+.+(-1/2008*1/2009)+(-1/2009*1
|1/2-1|+|1/3-1/2|+1/4-1/3|+...|1/2009-1/2008|+|1/2010-1/2009
"1*2/1+2*3/1+3*4/1+.+2007*2008/1+2008*2009/1+2009*2010/1"这道题
(-1)+2+(-3)+4+(-5)+.+(-2007)+2008
-1-2-3-4-5-...-2007-2008
1/(1*2)+1/(2*3)+1/(3*4)+.1/(2007*2008)=?