Read sections 2.4, 2.6 and 3.1.
I will not give quizzes on the material covered in section 3.1,
but the section is useful to you, as it describes techniques for
proving statements.
Do problems:
(2.4) 4, 6, 10beg, 12f, 14, 40, 42, 46
(3.1) 2, 6, 8, 20, 24, 32