(1/2006-1)x(1/2005-1)x……(1/2-1)等于多少
2个回答
(1/2006-1)x(1/2005-1)x……(1/2-1)=(-2005/2006)x(-2004/2005)x……(-1/2)(约分.)
=(-1)^2005/2006
=-1/2006
相关问题
1+2+3+.+2005+2006+2007+2006+2005+...+3+2+1等于多少?
1x1/2 2x1/3 3x1/4 ……2005x1/2006 2006x1/2007
1除以(X+1)X+2)+1除以(X+3)(X+4)...1除以(X+2005)(X+2006)等于几?
1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+...1/(x+2005)(x+2006)
(1-1/2)X(1-1/3)X(1-1/4)X(1-1/5)X.X(1-1/2005)X(1-1/2006)
x/1*2+x/2*3+……+x/2005*2006=2005
化简1/(x+1)(x+2)+1/(x+3)(x+4)+……1/(x+2005)(x+2006)=
解方程1/(x+1)(x+2)+1/(x+2)(x+3)+.+1/(x+2005)(x+2006)=1/2x+4012
已知2005x^3=2006y^3=2007z^3,且1/x+1/y+1/z=1,说明3√2005x^2+2006y^2
当X分别取1/2007,1/2006,.1/2,1.2005,2006,2007时,求1-X^2/1+X^2的所有值的和