计算:(a^2)/(a^2-ab-ac+bc)+(b^2)/(b^2-bc-ba+ca)+(c^2)/(c^2-ca-cb+ab)
人气:145 ℃ 时间:2019-12-06 03:06:10
解答
(a^2)/(a-b)(a-c))+(b^2)/(b-c)(b-a)+(c^2)/(c-a)(c-b) =(a^2)/(a-b)(a-c))-(b^2)/(b-c)(a-b)+(c^2)/(a-c)(b-c) =[(a^2)(b-c) -(b^2)(a-c)+(c^2)(a-b)]/(a-b)(a-c)(b-c) =[(a^2)b-(a^2)c-(b^2)a+(b^2)c+(c^...这是最简了?
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