f(x)=2/x+9/(1-2x)(x属于（0,0.5）)的最小值
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f(x)={2x+1,x
f(x)={1+x/2,x
f(x)=(x-1)/(x+2)
f(x)=x^2+x (x
f(x)+f((x-1)/x)=2x; x!=0,1; 求f(x)
f(x)+f[(x-1)/x]=2x x不等于0,1.求f(x).
max{f(x),g(x)}=1/2(f(x)+g(x)+|f(x)-g(x)|
求f(x)=(x-2)^2/(x+1),f(x)=(x^2+9)(x-3/x)的导数.
f(x)=x(x-1)(x-2).(x-10),则f'(9)=
f(x)=(x-1)(x-2)(x-3).(x-10) 求f'(9)=?
f(X)=f(X+2)(x
若f(x)满足f(x)-2f(1/x)=x,则f(x)=?
若F(x)满足f(x)+2f(1/x)=x,则f(x)=
f(x)满足:2f(x)-f(1/x)=x+1,求f(x)
设函数f(x)满足f(x)+2f(1/x)=x,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)
F(X)满足F(x)+2f(x分之1)=3X,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)?