数学渗透法制教育教案:(1+1/2)x(1-1/2)x(1+1/3)x(1-1/3)x..........x(1+1/9)x(1-1/9)=?

(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)] 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*x-3x+1=0，求x*x+1/x*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=? 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=? f(x)=2x(x-1)/(2x-3) x>2求最小值