作业帮 > 数学 > 作业

1/2(x+1)+1/3(x+2)+1/4(x+3)+.+1/2007(x+2006)=2006

来源：学生作业帮 编辑：大师作文网作业帮 分类：数学作业 时间：2024/11/12 16:01:26
1/2(x+1)+1/3(x+2)+1/4(x+3)+.+1/2007(x+2006)=2006
1/2(x+1)+1/3(x+2)+1/4(x+3)+.+1/2007(x+2006)=2006
1/2x+1/2+1/3x+2/3+1/4x+3/4+……+1/2007x+2006/2007=1+1+1+……+1
(1/2+1/3+……+1/2007)x=(1-1/2)+(1-2/3)+……+(1-2006/2007)
(1/2+1/3+……+1/2007)x=1/2+1/3+……+1/2007
x=1
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 若x^3+x^2+x+1=0,求代数式1+x+x^2+x^3+x^4+x^5+...+x^2006+x^2007的值 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+...1/(x+2005)(x+2006) 若x^3+x^2+x+1=0,求x^2008+x^2007+x^2006+x^2005的值 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2) 1/((x-1)*(x-2))+1/((x-2)*(x-3))+1/((x-3)*(x-4)).+1/((x+2006) 化简：1/X(X+1) +1/(X+1)+(X+2) +1/(X+2)(X+3) +.+1/(X+2006)(X+200 1/(x-4)(x-3)+1/(x-3)(x+2)+1/(x-2)(x-1)+1/(x-1)x+1/x(x+1)=1/x y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1