作业帮X-1/1+(X-1)(X-2)/1+(X-2)(X-3)+...+(X-2007)(X-2008)/1
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/27 08:45:24
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X-1/1+(X-1)(X-2)/1+(X-2)(X-3)+...+(X-2007)(X-2008)/1
X-1/1+(X-1)(X-2)/1+(X-2)(X-3)+...+(X-2007)(X-2008)/1
X-1/1+(X-1)(X-2)/1+(X-2)(X-3)+...+(X-2007)(X-2008)/1
原式= (X-1)/1+(X-2)/1-(X-1)/1+(X-3)/1-(X-2)/1+……+(X-2008)/1-(X-2007)/1
=(X-2008)/1
*-----------------------------------------------*| 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
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分解因式----（X*X-X)(X*X-X-2)+1
】x(x+1)+x^2(x-1)
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