小班种植区观察记录表:x=9-1/2x 求x=?

x=9-1/2x 求x=? 5x-2/(x+2)(x-2)-(x-1)(x+2)/(x+2)(x-2)=0 x*(x/3)=(x-5)*(x/3+1)/2 x=? X^2-2X-1=0,X<0问X+1/X=? 已知x+1/x =4,则x^2/x^4+x^2+1 f(x)=(x-1)(x-2)(x-3).......(x-10) 求f'(9)=? f(x)=2x(x-1)/(2x-3) x>2求最小值 (x-4)(x-2)-(x-1)(x+3),其中x=-2/5 已知函数f(x)=x^2+2x+a/x,x∈[1,+∞) 已知x*x-3x+1=0，求x*x+1/x*x