补集
complement Given a universal set U and a subset A of U, the complement of A is the set of all elements in U that are not in A, denoted $\complement_U A$ or $A^c
CSCA 数学 考试术语
complement Given a universal set U and a subset A of U, the complement of A is the set of all elements in U that are not in A, denoted $\complement_U A$ or $A^c
CSCA 数学 考试术语