Determine how many integer solutions there are to x1 + x2 + x3 + x4 = 19,

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Determine how many integer solutions there are to x1 + x2 + x3 + x4 = 19, if
(a) 0 ≤ x1 for all 1 ≤ i ≤ 4
(b) 0 ≤ x1 < 8 for all 1 ≤ i ≤ 4
(c) 0 ≤ x1 ≤ 5, 0 ≤ x2 ≤ 6, 3 ≤ x3 ≤ 7, 3 ≤ x4 ≤ 8

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Discrete and Combinatorial Mathematics An Applied Introduction

ISBN: 978-0201726343

5th edition

Authors: Ralph P. Grimaldi

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Question Posted: Jun 21, 2016 08:37 AM

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Determine how many integer solutions there are to x1 + x2 + x3 + x4 = 19,

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x 1 x 2 x 3 x 4 19 a 0 x i 1 i 4 b For 1 i 4 let c i x i 8 Nc i x 1 x ...View the full answer

Discrete and Combinatorial Mathematics An Applied Introduction

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