f(xy)=f(x)+f(y),且当x大于1时,f(x)大于0

f(xy)=f(x)+f(y),且当x大于1时,f(x)大于0 f(xy)=f(x)+f(y)且f(8)=3则f(2)= 定义在(0,正无穷)上的函数f(x)满足f(xy)=f(x)+f(y),且当x>1时,f(x) 已知函数f(x)对任意xy属于R,总有f(x+y)=f(x)+f(y),且当x=0时,f(x)且当x=0时这句错的应该是 且当x>0时 导数：f(x+y)=f(x)f(y),且f'(o)=1,求f'(x)f(x+y)=f(x)f(y),且f'(o)=1,求f'(x)f(x+y)=f(x)+f(y)+2xy,且f'(o)存在,求f'(x) f(1+x)=af(x),且f'(0)=b,求f'(1) f(xy)=f(x)+f(y),证明f(x/y)=f(x)-f(y) 函数f(x)对一切实数xy都有f(x+y)-f(x)=y(y+2x+1)成立,且f(1)=01求f(0)2当f(x)=2更正：f(x)+2 若f(xy)=f(x)+f(y)且f(4)=1求f(1/16)若f（x+y)=f(xy) 求f(1） 函数F(X)对任何正数X,Y都有F(XY)=F(X)*F(Y)且F(X)不等于0.当X>1时,有F(X)1时,有F(X) f(x)定义域(0,正无穷),f(xy)=f(x)+f(y) 当x>1时,f(x) f(x)定义在(0,+无穷大) 当x>1时 f(x)>0,且f(xy)=f(x)+f(y) 解不等式f[x(x-1/2)]1时 f(x)>0,且f(xy)=f(x)+f(y)解不等式f[x(x-1/2)] 函数f(x)定义域R且为增函数,f(xy)=f(x）+f(y）证明f（x/y)=f(x)-f(y) f(x)是定义域在正实数的递增函数,且f(xy)=f(x)+f(y),求证：f(x/y)=f(x)-f(y) f(x+y)=f(x)+f(y)+2xy 对于xy都有f(x+y)=f(x)+f(y)且x>0都有f(x) 已知函数f x的定义域为,且对任意实数X,Y,都有F(XY)=F(X)+F(Y),且当X大于1时,F(X)大于0,F 已知f(x)对任意x.y属于R,只有f(x)+f(y)=f(x+y),且当x大于0时,f(x)小于0 比较f(-2)与f(8分之1）大..已知f(x)对任意x.y属于R,只有f(x)+f(y)=f(x+y),且当x大于0时,f(x)小于0 比较f(-2)与f(8分之1）大. f(x)对于任意正数x,y都有f(xy)=f(x)·f(y),且f(x)≠0,x>1时f(x)