031 Review Part 2, Problem 8

Let  $A={\begin{bmatrix}1&3&8\\2&4&11\\1&2&5\end{bmatrix}}.$  Find  $A^{-1}$  if possible.

Foundations:
To find the inverse of a matrix  $A,$  you augment the matrix  $A$
with the identity matrix and row reduce  $A$  to the identity matrix.

Solution:

Step 1:

Step 2:

Final Answer:

Return to Sample Exam