若(x^2+x+1)/x=4,则x^2/(3x^4-5x^2+3)=

若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 *-----------------------------------------------*| 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 || 一个“整式的乘法”的问题请先阅读下列解题过程,再仿做下面的问题.已知X*X + X - 1=0,求X*X*X + 2*X*X + 3的值.解X*X*X + 2X*X +3=X*X*X +X*X -X +X*X +X +3=X{X*X +X -1} +X*X +X -1 +4=0+0+4=4+ x + X*X + X*X*X=0.+ X*X + X*X*X 若x+1/x=4,则x^2/（x^4+x^2+1）= 若1/x-x=3,则x^2/x^4+x^2+1=( ) 若1/x+x=3,则x^2/x^4+x^2+1=____ 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 (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 (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 若x+x^2+x^3=-1 则x^2012+x^2011+x^2010+x^2009+…………+x^3+x^2+x+1= 若x^3+x^2+x+1=0,则x^-27+x^-26+x^-25+……+x^-1+1+x+……+x^26+x^27 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 若(x^2+x+1)/x=4,则x^2/(3x^4-5x^2+3)= 若4x-1/(x+2)(x-1)=m/(x+2)+x/(x-1)则m等于 若x+1/x=3,则x^4-x^3+2x^2-3x+7的值为 若f(x)=x(x-1)(x-2)(x-3)(x-4),则f'(0)=? 若函数f(x)满足f(x)+2f(1/x)=5x+4/x,则f(x)=