化简1/1+x+2/1+x^2+4/1+x^4+…+n/1+x^n-2n/1-x^2n 1、化简1/(1+x)+2/(1+x^2)+4/(1+x^4)+…+n/（1+x^n）-2n/（1-x^2n）要计算过程.2、如果-5

*-----------------------------------------------*| 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 || 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做 化简：[(x+2)/x-(x-1)/(x-2)]/[(x-4)/(x^2-4x+4)] [x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简[x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简 (x/x-2)+(2/x*2+2x)-(x+6/x*2-4)化简,=x^2/x(x-2)+(2x-4)/x(x^2-4)-(x^2+6x)/x(x^2-4)=x^2/x(x-2)-(x+2)/x(x-2)=(x-2)(x+1)/x(x-2)=(x+1)/x 化简：x(x^2+x)/x^2(x^2-1) x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 化简:(x-1)(x+2)(x-3)(x+4)+24 化简 (x+1)(x+2)(x+3)(x+4)-8 x^5-x^4+x^3-x^2+x-1 x^6-x^5+x^4-x^2+x-1 化简:1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4) 化简1/[x(x+2)]+1/[(x+1)(x+3)]+1/[(X+2)(X+4)].+1/[(X+9)(X+11)] 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 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 化简 [(x+2)/(x^2-2x)-(x-1)/(x^2-4x+4)]/[(x-4)/x]要求要过程. 化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x) 化简[(x+2）/（x²-2x)+(x-1)/(x²-4x+4)]除以（x-4)/x