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1. Consider the linear equation system Ax = b with A = ( -9.8 19.8 -9.9 19.9 3) and b= = ( 1080 ) . In the following, you may use that the inverse of the matrix A is given by A-¹ = 1 = ( 19.9 -19.8 9.9 -9.8 8). (a) What is the solution x of Ax = b? (b) Let xx denote the solution of the perturbed equation (A+SA)(x+dx) = b for ||A|| 0.01. Show that the relative error is bounded by ||dx||∞ ||x||∞ ≤1.

1. Consider the linear equation system Ax = b with A = ( -9.8 19.8 -9.9 19.9 3) and b= = ( 1080 ) . In the following, you may use that the inverse of the matrix A is given by A-¹ = 1 = ( 19.9 -19.8 9.9 -9.8 8). (a) What is the solution x of Ax = b? (b) Let xx denote the solution of the perturbed equation (A+SA)(x+dx) = b for ||A|| 0.01. Show that the relative error is bounded by ||dx||∞ ||x||∞ ≤1.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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1. Consider the linear equation system Ax = b with A = ( -9.8 19.8 -9.9 19.9 3) and b= = ( 1080 ) . In the following, you may use that the inverse of the matrix A is given by A-¹ = 1 = ( 19.9 -19.8 9.9 -9.8 8). (a) What is the solution x of Ax = b? (b) Let xx denote the solution of the perturbed equation (A+SA)(x+dx) = b for ||A|| 0.01. Show that the relative error is bounded by ||dx||∞ ||x||∞ ≤1.
Transcribed Image Text:1. Consider the linear equation system Ax = b with A = ( -9.8 19.8 -9.9 19.9 3) and b= = ( 1080 ) . In the following, you may use that the inverse of the matrix A is given by A-¹ = 1 = ( 19.9 -19.8 9.9 -9.8 8). (a) What is the solution x of Ax = b? (b) Let xx denote the solution of the perturbed equation (A+SA)(x+dx) = b for ||A|| 0.01. Show that the relative error is bounded by ||dx||∞ ||x||∞ ≤1.
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