设f(x)=x/x^2+1,则f(1/x)=( ) A.f(x) B.-f(x) C.1设f(x)=x/x^2+1,则f(1/x)=( )A.f(x)B.-f(x)C.1/f(x)D.1/f(-x)

设函数f(x)满足f(x)+2f(1/x)=x,求f(x) 设f(x)+2f(1/x)=2x+1,则f(x)= 设2f(x)+f(1-x)=x^2,则f(x)=? 设f(x)满足f(1/x)=x/1-x设设f(x)满足f(1/x)=x/1-x ,则f(x+1)=? 设f(x)=x(x-1)(x-2)...(x-999),则f'(0)=? 设f(x)=x(x-1)(x-2).(x-1000) 则f'(0)=?RT 设f(x)=x(x+1)(x+2).(x+100),则f '(0)= 高数题：设f(x)=x.(x+1).(x+2).(x+n),则f 3Q 设函数f(x)满足f(x)+2f(1/x)=2x+1,则f(x)= 设f(x)满足3f(x)+2f(1/x)=4x,则f(x)=＿＿. 设f(x)满足f(x)+2f(1/x)=3x,则f(x)的表达式是? 设f(x)=1/x(x 设f(x)=1-x,(x 设f(x)+f(x-1／x)=2x,求f(x)=? 设f(x)={3x-1,x=0,求f(-x),f(x-2). 设f(x)=x/2+1/x(x 设2f(x)+xf(1/x)=(x+2x)/(x+1),求f(x). 设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X)