设f(x)满足f(-x)+2f(x)=x+3,则f(1)等于——————（写出步骤）

设函数f(x)满足f(x)+2f(1/x)=x,求f(x) 设f（x)满足f(-x)=-f(x),f(x)=f(4-x),x∈[0,2)时,f(x)=x,则f(11.5)等于? 设函数f(x)满足f(x-1)=2x-5,求f(x平方) 设f(x)满足f(x)+f'(x)+f(x)=e^x+2,且f(0)=1,f'(0)=0,求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)满足关系式f(x)+2f(-x)=3x,则f(x)= 设函数f(x)满足f(x)+2f=x(x不等于0),求f(x) 设函数f(x)满足f(x)+2f(-x)=3x,求f(x)函数解析式. 设函数f(x)满足f(x)-2f(1/x)=x,求f(x)的解析式 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fx满足f(-x)+2f(x)=x+3,则f（1）等于 设f(x)是二次函数,满足f(x+1)=x^2-x-1,则f(x)= 设f(x)满足2f(x)+xf(1/x)=x+1,则f(1/x)=_______