Let V be all elements of R2 that have the form (a, a2) where a is a real number. Show that (3,9) is an element of V. Then show that 2(3,9) is not an element of V.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.3: Divisibility
Problem 23E: Let a and b be integers such that ab and ba. Prove that b=0.
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Let V be all elements of R2 that have the form (a, a2) where a is a real number. Show that (3,9) is an element of V. Then show that 2(3,9) is not an element of V.

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