早教吧 育儿知识 作业答案 考试题库 百科 知识分享

若混合积(axb)c=2,则混合积[(a+b)x(b+c)](c+a)=

题目详情
若混合积(a x b)c = 2,则混合积[(a + b) x (b + c)](c + a) =
▼优质解答
答案和解析
[(a + b) x (b + c)](c + a)
= [a x (b + c)+ b x (b + c)](c + a)
= (a x b +a x c+ b x c)(c + a)
= (a x b)c +(a x c)c+( b x c)c + (a x b)a +(a x c)a+( b x c)a
=(a x b)c +( b x c)a
=2+2
=4