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Unformatted text preview: cant order? 5. Let A = n m n Q 7n o . (i) List three elements of A . (ii) List three rational numbers that dont belong to A . (ii) Prove that A is closed under addition and closed under multiplication. 6. True or false? Explain. (i) n N , prime p such that p  n . (ii) prime p such that n N , p  n . 7. Determine whether the function f : N N N is onetoone. (i) f ( n,m ) = 2 m 6 n (ii) f ( n,m ) = 36 m 6 n 1 2...
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This note was uploaded on 12/07/2011 for the course MATH 210 taught by Professor Staff during the Spring '08 term at University of Delaware.
 Spring '08
 Staff
 Integers

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