EDB — 127

Exercises

1. [127] Prerequisites:[125]↺↻,[124]↺↻.

   Let $\tilde{B}=\{-b:b\in B\}$: show that $(A\oplus B{)}^c=A^c\ominus \tilde{B}$, where $A^c=X⧵A$ is the complementary.

   Solution 1

   [128]↺↻