A) Find all ordered pairs (a, b) such that matrix A is not invertible.\ B) Assume that the values of a and b are such that the equation Ax = e1 has a unique solution. Find only the value of x3 in the solution (in terms of a and b) by using Cramer’s rule.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 56E
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A) Find all ordered pairs (a, b) such that matrix A is not invertible.\

B) Assume that the values of a and b are such that the equation Ax = e1 has a unique solution. Find only the value
of x3 in the solution (in terms of a and b) by using Cramer’s rule.

Let
A =
1
a
b
1
2
3
0
−1
(Use this A in the rest of Question 25 where applicable.)
Transcribed Image Text:Let A = 1 a b 1 2 3 0 −1 (Use this A in the rest of Question 25 where applicable.)
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