设f(x+x^-1)=x^3+x^-3,g(x+x^-1)=x^2+x^-3,求f[g(x)]

设f(x)={3x-1,x=0,求f(-x),f(x-2). 设函数f(x)=-1/3x设函数f(x)=-1/3x 设f(x)={3e^(x-1),x 高数题：设f(x)=x.(x+1).(x+2).(x+n),则f 3Q 设函数f(x)={(1/2)^x(x≥4),f(x+3)(x 设f(x)+2f(1/x)=3x,这 f(x)的表达式是? 设函数f(x)满足f(x+x^-1)=x^3+x^-3,则f(x)的表达式是 设函数f(x)=(1/2）^x(x≥4), f(x)=f(x+3)(x 设f(x)=1/x(x 设f(x)=1-x,(x 设f(x)={1/x x＞2,3x-2 x小于等于-2 设f(x)满足3f(x)+2f(1/x)=4x,则f(x)=＿＿. 设f(x)=x^2-3x+2求f(a),f(1/x),f(x)+1 设f(x)满足f(x)+2f(1/x)=3x,则f(x)的表达式是? 设f(x)满足关系式f(x)+2f(1/x)=3x,求f(x) 设 f（x）满足关系式 f(x)+2f(1/x)=3x,求f（x）. 设f(x)满足关系式f(x)+2f(1/x)=3x,求f(x) 设函数f(X)=X-3(X≥100),f(X)=f(X