This has four parts to it. the following system oflinear equations x - y =2z=13 2x +2y -z =-6 -x + 3y +z = -7 a) Provide a coefficient matrix corresponding to the system oflinear equations b) what is the inverse of this matrix? c) What is the transpose of the matrix? d) find the determinant for this matrix?

Livia Cardenas

Livia Cardenas

Answered question

2022-07-31

This has four parts to it. the following system of linear equations
x - y =2z=13
2x +2y -z =-6
-x + 3y +z = -7
a) Provide a coefficient matrix corresponding to the system oflinear equations
b) what is the inverse of this matrix?
c) What is the transpose of the matrix?
d) find the determinant for this matrix?

Answer & Explanation

coolng90qo

coolng90qo

Beginner2022-08-01Added 14 answers

a) [ 1 1 2 13 2 2 1 6 1 3 1 7 ]
b) [ 1 1 2 1 0 0 2 2 1 0 1 0 1 3 1 0 0 1 ] = [ 1 1 2 1 0 0 0 4 3 2 1 0 1 3 1 0 0 1 ] R 1 + R 2 R 2
[ 1 1 2 1 0 0 0 4 3 2 1 0 0 2 1 1 0 1 ] R 3 + R 1 R 3
[ 1 1 2 1 0 0 0 4 3 2 1 0 0 0 5 4 1 2 ] R 3 + R 2 R 3
[ 1 0 5 / 4 1 / 2 1 / 4 0 0 1 3 / 4 1 / 2 1 / 4 0 0 0 1 4 / 5 1 / 5 2 / 5 ] R 1 + R 2 R 1
[ 1 0 5 / 4 1 / 2 1 / 4 0 0 1 0 1 / 10 1 / 10 3 / 10 0 0 1 4 / 5 1 / 5 2 / 5 ] R 1 ( 3 / 4 ) R 3 R 2
Finally
R 1 + ( 5 / 4 ) R 3 R 1
that is your inverse
[ 1 0 0 1 / 2 1 / 2 1 / 2 0 1 0 1 / 10 1 / 10 3 / 10 0 0 1 4 / 5 1 / 5 2 / 5 ]
A = [ 1 1 2 2 2 1 1 3 1 ] , A 1 = [ 1 / 2 1 / 2 1 / 2 1 / 10 1 / 10 3 / 10 4 / 5 1 / 5 2 / 5 ]
c) transpose: A = A T
d) Det(A)=-10
Det(A)=1(2+3)+1(2-1)-2(6+2)=-10

Do you have a similar question?

Recalculate according to your conditions!

New Questions in Linear algebra

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?