1)f(1/x)=(b/x+1)/(2/x+a)=(b+x)/(2+ax) k=f(x)f(1/x)=[(bx+1)/(2x+a)][(b+x)/(2+ax)] =(b/2a)[(x+1/b)/(x+a/2)][(b+x)/(x+2/a)] x+1/b=x+2/a且b+x=x+a/2 ∴1/b=2/a且b=a/2 a=2b k=(b/4b)[(x+1/b)/(x+b)][(b+x)/(x+1...