a>b>0,a^2+b^2=4ab求(a+b)/(a?

a>b>0,a^2+b^2=4ab求(a+b)/(a?: a>b>0,a^2+b^2=4ab 求(a+b)/(a-b)=?; a^2+b^2=4ab, a^2+2ab+b^2=6ab,(a+b)^2=6ab, a^2-2ab+b^2=2ab,(a-b)^2=2ab, (a+b)^2/(a-b)^2=3 a>b>0 所以(a+b)/(a-b)=√3