Question

 Find the inverse of the matrix equation using Gauss-Jordan method.

09 Jan 2026
Answer :
Word Count : 425
We are asked to find the inverse of [ A = \begin{bmatrix} 2 & 1 & 1 \ 3 & 2 & 1 \ 2 & 1 & 2 \end{bmatrix} ] using the Gauss-Jordan method. Step 1: Form the augmented matrix ([A | I]): [ \left[\begin{array}{ccc|ccc} 2 & 1 & 1 & 1 & 0 & 0 \ 3 & 2 & 1 & 0 & 1 & 0 \ 2 & 1 & 2 & 0 & 0 & 1 \end{array}\right] ] Step 2: Make the pivot of the first row equal to 1 by dividing the first row by 2: [ R_1 \to \frac{R_1}{2}: \left[\begin{array}{ccc|ccc} 1 & 0.5 &
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