f(x)=1-√(1-x^2),y=f(x+1)与y=f(3-x)关于直线l对称、求直线l的解析式

已知f(x)=3^x,求证：(1)f(x)·f(y)=f(x+y);(2)f(x)/f(y)=f(x-y). 设f(x)=e的y次方,证明：（1）,f(x)f(y)=f(x+y) ,(2),f (x)/f(y)=f(x-y) f(x+y)+f(xy-1)=f(x)f(y)+2f(n)表达式 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(x)值域 [ 3/8，4/9] y=f(x)+√1-2f(x) f(1+1/x)=x/1-x^2 求f(x) f(x+y)+f(x-y)=2f(x)f(y) 求证：f(0)=1 f(x+y)=f(x)·f(y),且f(1)=2,求f(2)/f(1)+f(3)/f(2)+...+f(2010)/f(2009) 设f(x)=ln√x,x>=1,y=f(f(x))设f(x)=ln√x,x>=1, y=f(f(x)),求dy/dx|x=0 2x-1,x 已知函数f(x)满足f(1)=1/4,f(x)+f(y)=4f(x+y/2)*f(x-y/2)则f(-2011)=? 已知函数f(x)满足f(2)=1/2,2f(x)f(y)=f(x+y)+f(x-y),则f(2012)=? 已知f(0)=1,f(x-y)=f(x)-y(2x-y+1),求f(x) f'(0)=1,f(x+y)=f(x)+f(y)+2xy,求f(x) f(x+y)=f(x)*f(y)-f(x)-f(y)+2已知函数f(x)满足:对任意x,y属于R,都有f(x+y)=f(x)f(y)-f(x)-f(y)+2成立,且x>0时,f(x)>2.(1)求f(0)的值,并证明：当x f(xy)=f(x)+f(y),证明f(1/x)=-f(x) 已知函数y=f(x),f(1)=2 f(x+3)≤f(x)+3 f(x+2)≥f(x)+2,求f(2009) f(1)=1/4,4f(x)f(y)=f(x+y)f(x-y),求：f(2010)=?注意，是4f(x)f(y) f(xy)=f(x)+f(y),f(2)=1,f(3)=? 已知y=f[x]满足f[x]+2f[1/x]=2/x 求f '[x]