3/x+2+1/x=4/x²+2x.

x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 解方程：x(6-x)-2x(x+1)-(x^3-3x^4)/x²=4 x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值 1/(x-4)(x-3)+1/(x-3)(x+2)+1/(x-2)(x-1)+1/(x-1)x+1/x(x+1)=1/x 2X²-X=6,4X²-3X-1=X-2,3X(X-3)=2(X-1)(X+1), 已知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1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值 2f(x)+x^2f(1/x)=(3x³-x²+4x+3)/(x+1) 2x²f(1/x) 解方程 (3x+1)(3x-1)=(x+2)(9x-4) 2（x-3)(x-2)-(x+3)²=(x-1)(x