Problem:
Question 1: What is relation and function?
Question 2: Show that (p ? q) ? (¬p ? r) ? (q ? r) is a tautology without using a truth,table.
Question 3: Show that ¬p ? (q ? r) and q ? (p?r) are logically equivalent without using a truth table.
Question 4: Show that ¬(p ? q) and p ? q are logically equivalent without using a truth table.
Please ashow your calculation step by step.