1/a-1/b-1/(a+b)=0有(b-a)/ab-1/(a+b)=0,b^2-a^2-ab=0,(b-a/2)^2=5a^2/4,b1=a(1+√5)/2,b2=a(1-√5)/2.(b1/a1)^2=(3+√5)/2,(a1/b1)^2=(3-√5)/2,(b2/a2)^2=(3-√5)/2,(a2/b2)=(3+√5)/2.b^2/a^2-a^2/b^2的值为:√5或-√5.
