设fn(x)=f[f...f(x)]（n个）,若f(x)=x/(1+x^2)^1/2,求fn(x).

设fn(x)=f[f...f(x)]（n个）,若f(x)=x/(1+x^2)^1/2,求fn(x). 设f(x)=(x-1)/(x+1),fn(x)=f{f[f··f(x)]}一共n个f,则f2006(x)= 设f(x)=2x+1,f1(x)=f[f(x)],fn(x)=f[fn-1(x)],(n>1,n属于正实数) 求f1(x) f2(x) f3(x)归纳fn(x）表达式 设F1(x)=sin3x,Fn+1(x)=F'n(x) (n为正整数),求Fn(x)? 设 f(x)=sinx,f1(x)=f'(X),f2(X)=f1'(X).fn+1(X)=fn'(X) n属于N+ 求f2007(X)=? 设f1(x)=2/(1+x),定义f(n+1)(x)=f1[fn(x)],an=[fn(0)-1]/[fn(0)+2],则a(2007)等于 设f(x)=f1(x)=(1+x)/(x-1) ,f n+1 (x)=f[fn(x)],则f2011(x)= 定义域和值域均为【0,1】的函数f（x）,定义f1（x）=f（x）,f2（x）=f(f1（x）),.,fn(x)=f(fn-1(x))n=1,2,3,.满足fn(x)=x的点x【0,1】为f的n段周期点,设f（x)={2x,0 设f(x)＝–2x+2,记f1(x)＝f(x),fn(x)＝f[fn-1(x)],n≥2,n∈N,则函数y＝fn(x)的图像恒过定点 . 设f(x)=ax+b,其中a,b为实数,f1(X)=f(x),fn+1(x)=f(fn(x)),n=1,2,3,.若f7(x)=128x+381 则a+b=RT 设函数f(x)=ax+b,其中a,b为实数,f1(x)=f(x),fn+1(x)=f(fn(x)),n=1,2,3…若f7(x)=128x+381,求a+b? 设函数f(x)=ax+b,其中a,b为实数,f1(x)=f(x),fn+1(x)=f(fn(x)),n=1,2,3…若f7(x)=128x+381,求a+b? 设f(x)＝–2x+2,记f1(x)＝f(x),fn(x)＝f[fn-1(x)],n≥2,n∈N,则函数y＝fn(x)的图像恒过定点 .设f(x)＝–2x+2,记f1(x)＝f(x),fn(x)＝f[fn-1(x)],n≥2,n∈N,则函数y＝fn(x)的图像恒过定点 . 设函数f(x)=ax+b,其中a,b为实数,f1(x)=f(x),fn+1(x)=f(fn(x)),n=1,2.若f5(x)= 设函数f(x=ax+b) 其中a+b为实数,f1(x)=f(x),f(n+1)(x)=f(fn(x)),n=1,2,3...若f5(x)=32x+93 则ab=? 设函数f(x)=ax+b 其中a+b为实数,f1(x)=f(x),f(n+1)[x]=f[fn(x)],n=1,2,3...若f5(x)=32x+93 则ab=? 设f(x)=x/(x+1),定义f1(x)=f(x),f2(x)=f1(f(x)),f3(x)=f2(f(x))……fn(x)=fn-1(f(x)),(n>=2,n属于N)则f100(x)=1的解为x=? 已知函数f(x)=(x-1)/(x+1),设f2(x)=f(f(x)),f3（x）=f(f2(x))...fn+1(x)=f(fn(x)),x∈R,n∈N+且n≥2,求方程f2011（x）=x的解集