The answers to exercises marked [BB] can be found in the Back of the Book.
Determine which of the following are true and which are false. Justify your answers.
(a) [BB] 3 ∈ {1,3,5}
(b) {3} ∈ {1,3,5}
(c)
(d) [BB] {3, 5} ⊈ {1, 3, 5}
(e)
(f) 1 ∈ {a + 2b | a, b even integers}
(g)
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