已知A={1,3,5,7},B={1,4,7},C=[2,5,7,8].规定∶A⊙B=[1,3,5,7]⊙[1,4,7]

问题描述:

已知A={1,3,5,7},B={1,4,7},C=[2,5,7,8].规定∶A⊙B=[1,3,5,7]⊙[1,4,7]
A⊙B=[1,3,5,7]⊙[1,4,7]=[1,3,4,5,7].根据此规定,可求(A⊙C)⊙B=?

A⊙C)⊙B=[1,7]