y=f(x)中f(1)=-2005/2007,且f(n)=(1-f(n-1))/(1+f(n-1)),f(2006)=?

给出下列三个等式:f(xy)=f(x)+f(y),f(x+y)=f(x)f(y)给出下列三个等式:f(xy)=f(x)+f(y),f(x+y)=f(x)f(y),f(x+y)=f(x)+f(y)/1-f(x)f(y),下列函数中不满足其中任何一个等式的是()A.f(x)=3^xB.f(x)=sinxC.f(x)=log2xD.f(x)=tanx要解析 y=f(x)中f(1)=-2005/2007,且f(n)=(1-f(n-1))/(1+f(n-1)),f(2006)=? 函数满足f(x+y)=f(x)+f(y),且f(1003)=2.求f(1)+f(3)+f(5)+…+f(2005)的值? 以知一次函数y=f(x)中,f(8)=16,f(2)+f(3)=f(5),则f(1)+f(2)+.+f(100)=( ) f(x+y)+f(xy-1)=f(x)f(y)+2f(n)表达式 f(1)=1/4,4f(x)f(y)=f(x+y)f(x-y),求：f(2010)=?注意，是4f(x)f(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(xy)=f(x)+f(y),证明f(1/x)=-f(x) f(xy)=f(x)+f(y),证明f(x/y)=f(x)-f(y) y=f(f(f(x))) 求导 已知f(x)=3^x,求证：(1)f(x)·f(y)=f(x+y);(2)f(x)/f(y)=f(x-y). f(x+y)=f(x)·f(y),且f(1)=2,求f(2)/f(1)+f(3)/f(2)+...+f(2010)/f(2009) 设指数函数f(x)=a^x(a>0,a不等于1),则下列等式中不正确的是A.f(x+y)=f(x)*f(y)B.f(x-y)=f(x)/f(y) C.f(nx)=[f(x)]^n (n?Q)D.f(xy)^n=[f(x)]^n * [f(y)]^n (n?N+) 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)满足f(1)=1/4 4f(x)f(y)=f(x+y)+f(x-y) (x ,y属于R)则 f(2010)=? f(x+y)+f(x-y)=2f(x)f(y) 求证：f(0)=1 f(x)=y满足f(xy)=f(x)+f(y)求f(1),f(-1) f(x)连续且可导,并且f(x+y)=[f(x)+f(y)]/[1-f(x)f(y)],求f(x)