Prove that a set with n elements has n(n 1)/2 subsets containing exactly two elements whenever

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Prove that a set with n elements has n(n − 1)/2 subsets containing exactly two elements whenever n is an integer greater than or equal to 2.

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 02, 2016 12:28 PM

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Prove that a set with n elements has n(n 1)/2 subsets containing exactly two elements whenever

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This proof will be similar to the proof in Example 10 The basis step is clear since for n 2 t...View the full answer

Discrete Mathematics and Its Applications

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