(x+1)(x+2)0

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 如果X*X--1=0,那么X*X*X+2*X*X+2008=几? 已知x*x+x-1=0求x*x*x-2x+2010的值 已知x*x+x-1=0 求x*x*x-2x+11=? x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002 lim(1-x)^(2/x) x->0 x>0,x- (x)/（2x+1) + (2x+1)/(x) 的最小值是多少?x>0,x- (x)/（2x+1) + (2x+1)/(x^2)才对。 *-----------------------------------------------*| 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/x-1-2x-2/x-1=0 6/(x-1)-(x+2)/x(x-1)=0 5/x^2+x - 1/x^2-x=0 lim(x->0)((2-x)/(3-x))^1/x (x+2)(x-3)(x-6)(x-1)=0 函数f(x)=x^2+x+1/x,0 lim(x→0)e^x-x-1/x^2 (x-1)/(x-2)>0, (x+1)(x+2)0