confederation cup:[(x -1)/x] / (x- 1/x) 有供选择`
来源:百度文库 编辑:中科新闻网 时间:2024/10/03 15:21:40
有选择:A 1/(x+1)
B 1
C 1/(x-1)
D -1
B 1
C 1/(x-1)
D -1
A
(x*x*x-x*x+x)/(x*x*x+1)+(x*x+x+1)/[(1-x*x)/x)]
(x*x*x-x*x+x)/(x*x*x+1)+(x*x+x+1)/[(1-x*x)/x)]
已知x*x-3x+1=0,求x*x+1/x*x
解一元二次方程X*X+1/X*X+X+1/X=0
当1<x<2时化简| x-1|/1-x-x/|x|-|x-2|/2-x
5x-2/(x+2)(x-2)-(x-1)(x+2)/(x+2)(x-2)=0
计算[(x-1)/(x-2)-(x-2)(x-3)-(x-3)/(x-4)+(x-4)(x-5)]/(2x-7)
x*(x/3)=(x-5)*(x/3+1)/2 x=?
已知x+1/x =4,则x^2/x^4+x^2+1
X^2-2X-1=0,X<0问X+1/X=?