(a-b)^2(a-b)^2(b-a)(b-a)^2此题目可以么?(a-b)^2(a-b)^2(b-a)(b-a)^2=(b-a)^7=b^7-c(7,1)ab^6+c(7,2)a^2b^5-c(7,3)a^3b^4+c(7,4)a^4b^3-c(7,5)a^5b^2+c(7,6)a^6b-a^7其中：c(7,1)=7c(7,2)=7*6/(2*1)=21c(7,3)=7*6*5...
(a-b)^2(a-b)^2(b-a)(b-a)^2此题目可以么?(a-b)^2(a-b)^2(b-a)(b-a)^2=(b-a)^7=b^7-c(7,1)ab^6+c(7,2)a^2b^5-c(7,3)a^3b^4+c(7,4)a^4b^3-c(7,5)a^5b^2+c(7,6)a^6b-a^7其中：c(7,1)=7c(7,2)=7*6/(2*1)=21c(7,3)=7*6*5...