设函数f1(x)=x^1/2,f2(x)=x^-1,f3(x)=x^2,则f3(f2(f1(2007)))=?

问题描述:

设函数f1(x)=x^1/2,f2(x)=x^-1,f3(x)=x^2,则f3(f2(f1(2007)))=?

=f3(f2(f1(x)))=f3(f2(x^1/2)))=f3(x^(-1/2))=x^(-1),则f3(f2(f1(2007)))=2007^(-1)=1/2007