Math482Test2Spring2011solns

# Math482Test2Spring2011solns - UIUC MATH 482 Test 2 (Spring...

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Unformatted text preview: UIUC MATH 482 Test 2 (Spring 2011) Instructions: • This test has 7 pages including this cover sheet. • Answer 4 of the 5 problems given below. (I will grade all 5 problems and score you on the best 4.) • Each problem is scored out of 5 points. • This test is out of 20 points. • Justify all of your steps to ensure full credit. • No calculators or other aids are permitted. • Write your name and ID below and on every page. • Make your student ID available. NAME: STUDENT ID: 1 2 Q1. Use the dual simplex algorithm to solve the following linear pro- gram. min 4 x 1 + x 2 + x 3 = z subject to x 1 + x 2- 2 x 3 ≥ 1 2 x 1- x 2 ≥ 1 x 1 , x 2 , x 3 ≥ Solution: Note that surplus variables must be added to convert the problem to standard form, and that these surplus variables nicely form a starting basis. Note that they do not correspond to a basic feasible solution, however. Since all of the cost coefficients are nonnegative, the dual simplex is the right algorithm to use here.dual simplex is the right algorithm to use here....
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## This note was uploaded on 02/19/2012 for the course MATH 482 taught by Professor Staff during the Spring '08 term at University of Illinois, Urbana Champaign.

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Math482Test2Spring2011solns - UIUC MATH 482 Test 2 (Spring...

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