x/1×2+x/2×3+x/3×4+……x/2008×2009=2008.求x的值.

*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 1x+2x+3x+4x+5x+6x+7x…+99x=100 化简:X-2X+3X-4X+5X-……+2001x-2002x 化简:1+x+x(1+x)+x(1+x)^2+x(1+x)^3+……+x(1+x)^2005 x^2+x+1=0,求x^2+x+1+x^3+x^4+……+x^2006 f(x)=x(x-1)(x+2)(x-3)(x+4)……(x+100),求f'(1) x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 x^5-x^4+x^3-x^2+x-1 求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 1/(x+1)(x+2) + 1/(x+2)(x+3) + 1/(x+3)(x+4) …… 1/(x+2005)(x+2006)=1/2x+4012 试求|x-1|+|x-2|+|x-3|+|x-4|+……+|x-1999|的最小值 七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X. 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X （x^24 x^23 x^22 …… x）÷（x^8+1）×（x^3+x^2-x-1)÷（x-1)÷(x^4+1)求值（x^24+x^23+x^22+……+x+1)÷（x^8+1)×(x^3+x^2-x-1)÷(x-1)÷(x^4+1) -X+2x-3x+4x+…-2007x+2008x我着急 难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6