Jawaban A.11.1.

\((\bigcup_{\alpha\in I}A_\alpha)^c=\bigcap_{\alpha\in I}A_\alpha^c\) dan \((\bigcap_{\alpha\in I}A_\alpha)^c=\bigcup_{\alpha\in I}A_\alpha^c\text{.}\)
in-context