1.f(x)=x(x^2+1/x+1/x^3) 2.f(x)=(e^x+Inx)/x 3.f(x)=sinx(cosx+2^x) 4.f(x)=5log2(2x+1)

f(x)+f[(x-1)/x]=2x x不等于0,1.求f(x). f(x)={2x+1,x f(x)={1+x/2,x f(x)=(x-1)/(x+2) f(x)+f((x-1)/x)=2x; x!=0,1; 求f(x) max{f(x),g(x)}=1/2(f(x)+g(x)+|f(x)-g(x)| 1.f（x）+2f(1/x)=x 2.f(1/x)+2f(x)=1/x 已知f(x+1/x)=x^2+1/x^2+1/x则f(x) 已知函数f(x)=x^2+2/x,解不等式f(x)-f(x-1)>2x-1. 设2f(x)+xf(1/x)=(x+2x)/(x+1),求f(x). 函数F(x)=2x,x>=1,F(x)=x^2,x f(x)=|x+2|+|x-2|值域 f(x)=|x-2|-|x+1|值域 已知函数f（x)=2x+1,x>=0;f(x)=|x|,x f(x)=(x^2-2x-1)/x (x>0)求f(x)最小值 设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X) f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100) f(x)=2x(x+1)/(x-1) (1 f(x)满足:2f(x)-f(1/x)=x+1,求f(x)