vr虚拟现实游戏机厂家:化简[(1/x -1)+(1/1-x^2)](1-1/x)

(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 化简1+sin x—cos x /1+sin x+cos x 已知,x-(x-5)/2不大于(3-x)/3-1 化简 |x+1|-|3x-1| 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 已知x+1/x =4,则x^2/x^4+x^2+1 计算[(x-1)/(x-2)-(x-2)(x-3)-(x-3)/(x-4)+(x-4)(x-5)]/(2x-7)