f(xy)=f(x)+f(y),f(8)=3,求f(√2),

f(xy)=f(x)+f(y),证明f(x/y)=f(x)-f(y) f(xy)=f(x)+f(y)且f(8)=3则f(2)= f(xy)=f(x)+f(y),f(8)=3,则f(根2)等于 f(xy)=f(x)+f(y),f(8)=3,求f(√2), f(x+y)=f(x)+f(y)+2xy f(x+y)+f(xy-1)=f(x)f(y)+2f(n)表达式 f(xy)=f(x)+f(y)的单调性 f(xy)=f(x)+f(y),证明f(1/x)=-f(x) 已知f(xy)=f(x)+f(y),求证f(x/y)=f(x)-f(y) f(x/Y）=f（x）-f(y) 求证明 f(xy)=f(x)+f(y) 以知f(xy)=f(x)+f(y)求证f(x/y)=f(x)－f(y) 以知f(x/y)=f(x)－f(y)求证f(xy)=f(x)+f(y) f(xy)=f(x)+f(y),f(2)=1,f(3)=? f(xy)=f(x)+f(y)且f（8）=3 求f（根号2） 对于任意整数x,y函数f(x)满足f(x+y)=f(x)+f(y)+xy+1.若f(1)=1.那么f(-8)等于? 对于任意整数x,y,函数f(x)满足f(x+y)=f(x)+f(y)+xy+1,若f(1)=1,则f(8)等于 f(x)=y满足f(xy)=f(x)+f(y)求f(1),f(-1) 若f(xy)=f(x)+f(y)且f(4)=1求f(1/16)若f（x+y)=f(xy) 求f(1）