2. Find the sum: 2+4 +6+...+2n. (Hint: you can use induction)
3. Arc the following statements logically equivalent?
(a) ~(p٨q) and (~pV~q)
(b) ~(pVq) and (~p٨~q)
(e) (A U B)c and Ac ∩ Bc (remember: Ac denotes the complement of the set A)
Logical equivalence is investigated. The solution is detailed and well presented.