(-1)+(+2)+(-3)+(-3)+(+4)+……+(-2007)+(+2008)+(-2009)+(+2010)简便计算
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(-1)+(+2)+(-3)+(-3)+(+4)+……+(-2007)+(+2008)+(-2009)+(+2010)简便计算(-1)+(+2)+(-3)+(-3)+(+4)+……+(-2007)+(
(-1)+(+2)+(-3)+(-3)+(+4)+……+(-2007)+(+2008)+(-2009)+(+2010)简便计算
(-1)+(+2)+(-3)+(-3)+(+4)+……+(-2007)+(+2008)+(-2009)+(+2010)简便计算
(-1)+(+2)+(-3)+(-3)+(+4)+……+(-2007)+(+2008)+(-2009)+(+2010)简便计算
[(-1)+(+2)]+[(-3)+(+4)]+……+[(-2007)+(+2008)]+[(-2009)+(+2010)]
=1+1+.+1+1
=1005
1+2-3-3-3-3=?
1^3+2^3+3^3+...+99^3+100^3
2 1 -2 -3
1,1,1,2,2,2,3,3,3,填三阶幻方
(-1/3)^2除以(-1/3)^3*(1/3)^3除以3^-2*(-3)^0
3题 1、2、3
-1-{(-3)²-[3+(2/3)*(-3/2)]/(-2)} 计算
1,1/2,3/2,3/8,( ),( )
1+1+2+2+3+3+````````````````````````````+99999
求和Sn=1+(1+3)+(1+3+3^2)+(1+3+3^2+3^3)+.+(1+3+3^2+3^3+...+3^n-1)
[(2^3-1)(3^3-1)...100^3-1)]/[(2^3+1)(3^3+1)...(100^3+1)]=?
求四阶行列式:2 -1 3 2 3 -3 3 2 3 -1 -1 2 3 -1 3 -1
(2/3+3)(3-2/3x)+(-2/3-1)(1+2/3x)
比较大小(4/3)^1/3,2^2/3,(-2/3)^3,(3/4)^1/2
1+3+2+1+1x2+3
1/(2^3)+1/(2^3+1)+1/(2^3+2)+1/(2^3+3)+...+1/(2^4-1)
(-4/3)*(-8+3/2-3/1)
-8/3+2/3-3/1*24