2+3+4+5+6+7+8=( )x( )

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2+3+4+5+6+7+8=( )x( )
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2+3+4+5+6+7+8=( )x( )
2+3+4+5+6+7+8=( )x( )

2+3+4+5+6+7+8=( )x( )
2+3+4+5+6+7+8=5*7

5×7

5X7

5x7

5×7

5×7

(1+2)+3+4+5-6-7+8-9 = 1
(1+2)+3+4-5+6+7-8-9 = 1
(1+2)+3+4*5-6*7+8+9 = 1
(1+2)+3-4-5-6-7+8+9 = 1
(1+2)+3*4*5/6*7-8*9 = 1
(1+2)-3+4-5-6+7-8+9 = 1
(1+2)-3-4+5+6-7-8+9 = 1
(1+2...

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(1+2)+3+4+5-6-7+8-9 = 1
(1+2)+3+4-5+6+7-8-9 = 1
(1+2)+3+4*5-6*7+8+9 = 1
(1+2)+3-4-5-6-7+8+9 = 1
(1+2)+3*4*5/6*7-8*9 = 1
(1+2)-3+4-5-6+7-8+9 = 1
(1+2)-3-4+5+6-7-8+9 = 1
(1+2)-3-4+5-6+7+8-9 = 1
(1+2)-3*4*5/6+7-8+9 = 1
(1+2)-3/4-5-6*7/8+9 = 1
(1+2)*3-4*5+6+7+8-9 = 1
(1+2)*3*4+5*6+7-8*9 = 1
(1+2)*3*4+5*6-7*8-9 = 1
(1+2)*3*4-5+6*7-8*9 = 1
(1+2)*3*4-5-6-7-8-9 = 1
(1+2)*3/4-5-6*7/8+9 = 1
(1+2)/3*4-5-6+7-8+9 = 1
(1-2)+3+4-5+6-7-8+9 = 1
(1-2)+3+4-5-6+7+8-9 = 1
(1-2)+3-4+5+6-7+8-9 = 1
(1-2)+3*4*5/6-7+8-9 = 1
(1-2)+3/4+5+6*7/8-9 = 1
(1-2)-3+4+5+6+7-8-9 = 1
(1-2)-3-4+5-6-7+8+9 = 1
(1-2)-3-4-5+6+7-8+9 = 1
(1-2)-3-4*5+6*7-8-9 = 1
(1-2)-3*4*5/6*7+8*9 = 1
(1-2)*3+4*5-6+7-8-9 = 1
(1-2)*3*4-5-6+7+8+9 = 1
(1*2)+3-4*5+6-7+8+9 = 1
(1*2)+3*4+5+6-7-8-9 = 1
(1*2)-3+4*5+6-7-8-9 = 1
(1*2)-3-4+5*6-7-8-9 = 1
(1*2)-3*4-5+6-7+8+9 = 1
(1*2)-3*4*5+6*7+8+9 = 1
(1*2)-3*4*5-6+7*8+9 = 1
(1*2)-3*4*5-6-7+8*9 = 1
(1*2)*3+4+5-6-7+8-9 = 1
(1*2)*3+4-5+6+7-8-9 = 1
(1*2)*3+4*5-6*7+8+9 = 1
(1*2)*3-4-5-6-7+8+9 = 1
(1*2)*3*4-5+6-7-8-9 = 1
(1/2)-3/4+5+6*7/8-9 = 1
(1/2)*3*4-5+6-7-8+9 = 1
(1/2)*3*4-5-6+7+8-9 = 1
1+(2+3)+4+5-6-7+8-9 = 1
1+(2+3)+4-5+6+7-8-9 = 1
1+(2+3)+4*5-6*7+8+9 = 1
1+(2+3)-4-5-6-7+8+9 = 1
1+(2+3)*4+5-6*7+8+9 = 1
1+(2+3)*4-5*6-7+8+9 = 1
1+(2+3)*4/5+6+7-8-9 = 1

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*-----------------------------------------------*| 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 || x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少 如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值, 已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x-9|+|x-10| 已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) 解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3 因式分解 x^8+x^7+x^6+x^5+x^4+x^3+x^2+x=? x-2/x-1+x-8/x-7=x-4/x-3+x-6/x-5 (X+2)/(X+1)-(X+4)/(X+3)=(X+6)/(X+5)-(X+8)/(X+7) 解方程 (x+2)/(x+1) - (x+4)/(x+3)=(x+6)/(x+5)-(x+8)/(x+7) x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解? 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 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 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程