(a-b)(a-c)分之a+(b-c)(b-a)分之b+(c-a)(c-b)分之c的结果等于( ) A,a B,b C,1 D,0

问题描述:

(a-b)(a-c)分之a+(b-c)(b-a)分之b+(c-a)(c-b)分之c的结果等于( ) A,a B,b C,1 D,0

(a-b)(a-c)分之a+(b-c)(b-a)分之b+(c-a)(c-b)分之c的结果等于(D,0 )
A,a B,b C,1 D,0