2007x(1-1/2)x（1-1/3）X(1-1/4).(1-1/2007)

*-----------------------------------------------*| 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 || 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 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. 解九宫格题目（X为未知数）9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 请问这道题咋做 ：（x）X (x+1) X (x+2) X (x+3) =360 (x-1)^3(x+1)（x-2）/(x+4) x(x+1)(x+2)(x+3)+1 (换元法） 1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...+1/(x+2006)(x+2007)过程 化简：1/X(X+1) +1/(X+1)+(X+2) +1/(X+2)(X+3) +.+1/(X+2006)(X+2007) 1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)...1/(x+2007)(x+2008) x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 计算 x(x+3)-(x-1)(x-2） 化简：x(2x+1)-x(x-3） x*x*x*x+2008x*x+2007x+2008(提示：x*x*x-1=（x-1）*（x*x+x+1）） （x+2)(x-2)+16 (x-1)(x-2)+3x（x+3）-4（x+2)(x-3)（x+2)(x-2)+16 (x-1)(x-2)+3x（x+3）-4（x+2)(x-3) [x（x+1）+x平方（x-1)]+（-3x) x{x+1}{x-1}}x-2}{x-3}-40 （x+1)(x+2)(x+3)(x+4）+1(x+1)(x-2)(x+3)(x-4)+25