7. Заполните таблицу истинности выражения $$(A \rightarrow B) \leftrightarrow (C \rightarrow D)$$.

Таблица истинности для выражения $$(A \rightarrow B) \leftrightarrow (C \rightarrow D)$$: | A | B | C | D | $$A \rightarrow B$$ | $$C \rightarrow D$$ | $$(A \rightarrow B) \leftrightarrow (C \rightarrow D)$$ | |---|---|---|---|--------------------|--------------------|-----------------------------------------------------| | 0 | 0 | 0 | 0 | 1 | 1 | 1 | | 0 | 0 | 0 | 1 | 1 | 1 | 1 | | 0 | 0 | 1 | 0 | 1 | 0 | 0 | | 0 | 0 | 1 | 1 | 1 | 1 | 1 | | 0 | 1 | 0 | 0 | 1 | 1 | 1 | | 0 | 1 | 0 | 1 | 1 | 1 | 1 | | 0 | 1 | 1 | 0 | 1 | 0 | 0 | | 0 | 1 | 1 | 1 | 1 | 1 | 1 | | 1 | 0 | 0 | 0 | 0 | 1 | 0 | | 1 | 0 | 0 | 1 | 0 | 1 | 0 | | 1 | 0 | 1 | 0 | 0 | 0 | 1 | | 1 | 0 | 1 | 1 | 0 | 1 | 0 | | 1 | 1 | 0 | 0 | 1 | 1 | 1 | | 1 | 1 | 0 | 1 | 1 | 1 | 1 | | 1 | 1 | 1 | 0 | 1 | 0 | 0 | | 1 | 1 | 1 | 1 | 1 | 1 | 1 |