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b) Consider the following system of linear equations: 2x1 + 2x3 - 3x3 =-1 3x1 - X2 +2x3 =7 5x1 + 3x2 - 4x3 = 2 i) Express this system of linear equations with a single function f: R - R, without using a matrix. i) Using the fact that -1 2 -3 3 -1 2 =|-11 3 -4 -7 -2 4 calculate the solution to the system of linear equations above. Show your working. iii) Using the fact that 1 2 -3 det 3 -1 2=0 15 3 -4 explain why we can't use the same method as before to find solutions to the system of linear equations below: *1 + 2x3 - 3x3 = 0 3x1 - Xạ + 2x, m 0 5x1 + 3x2 - 4x, = 0 iv) For the purposes of this question, we will call a system of linear equations uniform when all the constants are zero. For example, the system in the previous part is uniform. Explain why we can always find at least one solution for any uniform system of linear equations.

b) Consider the following system of linear equations: 2x1 + 2x3 - 3x3 =-1 3x1 - X2 +2x3 =7 5x1 + 3x2 - 4x3 = 2 i) Express this system of linear equations with a single function f: R - R, without using a matrix. i) Using the fact that -1 2 -3 3 -1 2 =|-11 3 -4 -7 -2 4 calculate the solution to the system of linear equations above. Show your working. iii) Using the fact that 1 2 -3 det 3 -1 2=0 15 3 -4 explain why we can't use the same method as before to find solutions to the system of linear equations below: *1 + 2x3 - 3x3 = 0 3x1 - Xạ + 2x, m 0 5x1 + 3x2 - 4x, = 0 iv) For the purposes of this question, we will call a system of linear equations uniform when all the constants are zero. For example, the system in the previous part is uniform. Explain why we can always find at least one solution for any uniform system of linear equations.

Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter2: Systems Of Linear Equations
Section2.4: Applications
Problem 16EQ
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b) Consider the following system of linear equations: 2x1 + 2x3 - 3x3 = -1 3x1 - x2 + 2x3 =7 5x1 + 3x2 - 4x3 = 2 i) Express this system of linear equations with a single function f: R- R', without using a matrix. i) Using the fact that -1 2 -3 3 -1 2 =|-11 3 -4 -7 -2 4 calculate the solution to the system of linear equations above. Show your working. iii) Using the fact that 1 2 -3 det 3 -1 2 = 0 15 3 -4 explain why we can't use the same method as before to find solutions to the system of linear equations below: *1 + 2x3 - 3x3 = 0 3x1 - Xạ + 2x m 0 5x1 + 3x2 - 4x, = 0 iv) For the purposes of this question, we will call a system of linear equations uniform when all the constants are zero. For example, the system in the previous part is uniform. Explain why we can always find at least one solution for any uniform system of linear equations.
Transcribed Image Text:b) Consider the following system of linear equations: 2x1 + 2x3 - 3x3 = -1 3x1 - x2 + 2x3 =7 5x1 + 3x2 - 4x3 = 2 i) Express this system of linear equations with a single function f: R- R', without using a matrix. i) Using the fact that -1 2 -3 3 -1 2 =|-11 3 -4 -7 -2 4 calculate the solution to the system of linear equations above. Show your working. iii) Using the fact that 1 2 -3 det 3 -1 2 = 0 15 3 -4 explain why we can't use the same method as before to find solutions to the system of linear equations below: *1 + 2x3 - 3x3 = 0 3x1 - Xạ + 2x m 0 5x1 + 3x2 - 4x, = 0 iv) For the purposes of this question, we will call a system of linear equations uniform when all the constants are zero. For example, the system in the previous part is uniform. Explain why we can always find at least one solution for any uniform system of linear equations.
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