(1+0.228-0.21)x(0.228-0.21+0.2003)-(1+0.228-0.21+0.2003)x(0.
[x(x+1)+x平方(x-1)]+(-3x)
计算(1+0.21+0.32)x(0.21+0.32+0.43)-(1+0.21+0.32+0.43)x(0.21+0.
先化简,再求值:[(x-2/x²+2x)-(x-1/x²+4x+4)]÷﹙x-4/x+2﹚,其中x&
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
(x/x-1)+(5x-2)/x*x-x=1 求x(有图)
已知x²+3x+1=0.(1)x²+1/x²;(2)x-1/x
﹣(x²-5-4x)-x(x²+x-1),其中x=-1.先化简再求值
已知实数x满足x²-3x+1=0.求(1)x+ 1/x (2)x²+ 1/x² (3)x-
2x(x-1)+2=x(x+1)
设函数f(x)满足2f(x-1/ x) +f(x+1/x)=1+x,其中x≠0.x属于R
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1