x×1/30×1+(x+6)×1/30×2=1听说答案是6,可我怎么也解不出来,每一步要详细,
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x/6+x/12+x/20+x/30=1
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
1/x(x+3)+1/(x+3)(x+6)+---+1/(x+27)(x+30)
*-----------------------------------------------*| 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
x^3+x-30(分解因式);x^12-y^12;x^15+x^14+x^13.x^2+x+1
计算:1/X(X+2)+1/(X+2)(X+4)+...+1/(X+28)(X+30)
先观察下列各式,(x+5)(x+6)=x²+11x+30 (x-5)(x-6)=x²-11x+30先观察下列各式,(x+5)(x+6)=x²+11x+30(x-5)(x-6)=x²-11x+30(x-5)(x+6)=x²+x-30(x+5)(x-6)=x²-x-30(1)乘
x/2+x/6+x/12+x/20+x/30+x/42=1如题,解方程,在线等
X/2+X/6+X/12+X/20+X/30+X/42=1用简便方法解
(x^2-3x+1)^3怎么算出x^6-9x^5+30x^4-45x^3+30x^2-9x+1
分解因式(x^2-3x)/(x^2-6x+9)×(x^2-11x+30)/(x^2-5x)-1
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
约分:1、x*x-9/6-2x 2、x*x-1/x-x*x
x^6-x^5+x^4-x^2+x-1
x/x+(1-x)/x-1/x
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