若5x+1/x=5,则5^2+1/x^2=?

*-----------------------------------------------*| 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 || f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(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 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若2X*X-5X+(8/2X*X-5X+1)-5=0,则2x*x-5x-1的值为多少 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) x(x-2)-2x(x+1)-3x(x-5) 其中x=负½ (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4 若x^3+x^2+x+1=0,求代数式1+x+x^2+x^3+x^4+x^5+...+x^2006+x^2007的值 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 若x^2-5x+1=0,则x^2+x+1/x^2+1/x= 若(x^2+x+1)/x=4,则x^2/(3x^4-5x^2+3)= 若函数f(x)满足f(x)+2f(1/x)=5x+4/x,则f(x)= x^5-x^4+x^3-x^2+x-1 x^6-x^5+x^4-x^2+x-1