Introductory Combinatorics
Introductory Combinatorics
5th Edition
ISBN: 9780136020400
Author: Richard A. Brualdi
Publisher: Prentice Hall
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Chapter 6, Problem 6E
To determine

The number of options of the box of doughnuts.

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You manage a chemical company with 2 warehouses. The following quantities of Important Chemical A have arrived from an international supplier at 3 different ports: Chemical Available (L) Port 1 400 Port 2 110 Port 3 100 The following amounts of Important Chemical A are required at your warehouses: Warehouse 1 Warehouse 2 Chemical Required (L) 380 230 The cost in£to ship 1L of chemical from each port to each warehouse is as follows: Warehouse 1 Warehouse 2 Port 1 £10 Port 2 £20 Port 3 £13 £45 £28 £11 (a) You want to know how to send these shipments as cheaply as possible. For- mulate this as a linear program (you do not need to formulate it in standard inequality form) indicating what each variable represents. (b) Suppose now that all is as in the previous question but that only 320L of Important Chemical A are now required at Warehouse 1. Any excess chemical can be transported to either Warehouse 1 or 2 for storage, in which case the company must pay only the relevant transportation…
Suppose we have a linear program in standard equation form maximize cx subject to Ax = b, x > 0. and suppose u, v, and w are all optimal solutions to this linear program. (a) Prove that z = u+v+w is an optimal solution. (b) If you try to adapt your proof from part (a) to prove that that u+v+w is an optimal solution, say exactly which part(s) of the proof go wrong. (c) If you try to adapt your proof from part (a) to prove that u+v-w is an optimal solution, say exactly which part(s) of the proof go wrong.
Can the expert solve an Integral In detall? Hoxto³ W. 1 w = dw 大 90x103 80*10³ ⑥M = 1 1012 221 JW 70x10 80x103 © P= ± Sin (lw/+1) dw 70*10*A

Chapter 6 Solutions

Introductory Combinatorics

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