Using matrix inversion method , save x + y + z = 3; x + 2y + 3z = 4; x + 4y 9z = 6

2.9kviews

written 5.6 years ago by

teamques10 ★ 69k

modified 3.0 years ago by

pedsangini276 • 4.8k

engineering mathematics

ADD COMMENT EDIT

1 Answer

206views

written 5.6 years ago by

teamques10 ★ 69k

• modified 5.6 years ago

Solution:

let A =

$\begin{bmatrix} 1 & 1 & 1\ 1 & 2 & 3\ 1 & 4 & 9 \end{bmatrix}$

|A| =

$\begin{vmatrix} 1 & 1 & 1 \ 1 & 2 & 3\ 1 & 4 & 9 \end{vmatrix}$

$|A| = 1(18-12)-1(9-3)+1(4-2)$

$|A| = 2 \neq 0$

$A^{-1} …

Create a free account to keep reading this post.

and 3 others joined a min ago.

ADD COMMENT EDIT

Please log in to add an answer.