f(x)=9^x/(9^x+3),求f(1/2000)+f(2/2000)+……+f(1999/2000)
已知函数f(x)满足f(x)+f(10-x)=2,则f(1)+f(2)+f(3)+…f(9)=
F(X)满足F(x)+2f(x分之1)=3X,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)
已知f(x)满足2f(x)+f(1/x)=3x,求f(x)?
已知f(x)满足2f(x)+f(-x)=-3x+1,求f(x)
1.已知,f(x)=x^2/(1+x^2),求f(1)+f(1/2)+f(3)+f(1/3)+……+f(n)+f(1/n
f(x)=1/(2[x]-2[1/2]),求S=f(-9)+f(-8)+……+f(10).
f(x)=x/1+x,求代数式f(1/2004)+f(1/2003)+…+f(1/2)+f(1)+f(0)+f(1)+f
f(x)=sin60度X,求f(1)+f(2)+f(3)+.f(2010)
f(x+y)=f(x)·f(y),且f(1)=2,求f(2)/f(1)+f(3)/f(2)+...+f(2010)/f(
已知二次函数f(x)满足f(3x+1)=9x^2-6x+5,求f(x)
f(x)=x/1+x,求代数式f(1/2004)+f(1/2003)+……+f(1/2)+f(1)+f(0)+f(1)+