1.f(1-x)=x2,则f(x)=____________,若f(ax)=x(a>0,且a≠1),则f(x)=______.若f(x- ,
则f(x)=__________.
2.已知f(x)= ,则f(x)+f( =_____________.
3.若f(x)=x2-mx+n,f(n)=m,f(1)=-1,则f(-5)=____________.
4.已知 ,若g[f(x)]=x2+x+1,则a=_____________.
5.已知f(1-cosx)=sin2x,则f(x)=________________.
6.已知f(cosx)=cos5x,则f(sinx)=________________.