解题：a=5+√3 b=22/5+√3=5-√3 则 a/(a-√ab) -√b/(√a+√b) =(√a)^2/√a(√a-√b)-√b/(√a+√b) 通分后 =√a（√a+√b)-√b(√a-√b)/a-b =a+√ab-√ab+b/a-b =a+b/a-b =5√3/3
