[(a√b)+(b√a))/(√a+√b)]×{(√b)/[(√ab)-b]-1/[(√a)+(√b)]÷[√b/(a-b)],其中a=3-√5,b=3+√5
[(a√b)+(b√a))/(√a+√b)]×{(√b)/[(√ab)-b]-1/[(√a)+(√b)]÷[√b/(a-b)],其中a=3-√5,b=3+√5
[(a√b)+(b√a))/(√a+√b)]×{(√b)/[(√ab)-b]-1/[(√a)+(√b)]÷[√b/(a-b)],其中a=3-√5,b=3+√5
[(a√b)+(b√a))/(√a+√b)]×{(√b)/[(√ab)-b]-1/[(√a)+(√b)]÷[√b/(a-b)],其中a=3-√5,b=3+√5
[(a√b)+(b√a))/(√a+√b)]×{(√b)/[(√ab)-b]-1/[(√a)+(√b)]}÷[√b/(a-b)]
=[√ab(√a+√b)/(√a+√b)]×[(√a+√b-√a+√b)/(a+b)]×[(a-b)/√b]
=√ab×2
=2×√[(3-√5)(3+√5)]
=2×√(9-5)
=2×2
=4
好长啊看不懂
附议
强烈要求楼主用照片把原题照下来,要不然太乱了,没法帮助你啊 有了!!!