Express the following systems of equations in the form Ax = b where A € R2×3 and beR². x1 2x1 + X2 + + -x1 + -x3 x3 Compute rref(A), what is the rank of A? Is it full rank? Compute AAT. 3 -12

Algebra for College Students
10th Edition
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter11: Systems Of Equations
Section11.1: Systems Of Two Linear Equations In Two Variables
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Problem 8. The following problem outlines and expects you to execute the process of finding a solution
to a system of equations.
(a) Express the following systems of equations in the form Ax
beR².
X1
2x1
-x3
x2
+
+ -X1 + x3
=
=
=
3
-12
b where A € R²×3 and
2x3
(b) Compute rref(A), what is the rank of A? Is it full rank?
(c) Compute AAT.
(d) AAT is 2 × 2, use the formula below for the inverse of a 2 × 2 matrix to find (AA¯)-¹.
(e) Use (AAT)-¹ to compute a right inverse to A.
(f) Use the right inverse of A from (e) to find a solution to the system from (a).
Transcribed Image Text:Problem 8. The following problem outlines and expects you to execute the process of finding a solution to a system of equations. (a) Express the following systems of equations in the form Ax beR². X1 2x1 -x3 x2 + + -X1 + x3 = = = 3 -12 b where A € R²×3 and 2x3 (b) Compute rref(A), what is the rank of A? Is it full rank? (c) Compute AAT. (d) AAT is 2 × 2, use the formula below for the inverse of a 2 × 2 matrix to find (AA¯)-¹. (e) Use (AAT)-¹ to compute a right inverse to A. (f) Use the right inverse of A from (e) to find a solution to the system from (a).
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