a+b-c/a = a+c-b/b = -a+b+c/c
然后由等比定理(a/b =c/d = a+c/b+d)
知 a+b-c/a = a+c-b/b = -a+b+c/c= a+b+c/a+b+c =1
b-c=0 a+c=2 b-a=0
(a+b)(b+c)(a+c)/abc =8
a+b-c/a = a+c-b/b = -a+b+c/c
然后由等比定理(a/b =c/d = a+c/b+d)
知 a+b-c/a = a+c-b/b = -a+b+c/c= a+b+c/a+b+c =1
b-c=0 a+c=2 b-a=0
(a+b)(b+c)(a+c)/abc =8