The matrix is .
Since a11 is the element in row 1, column 1.
Observe the matrix A; it has 3 rows and 4 columns.
Since a11 is the element in row 1, column 1, the value of a11 = 1.
The matrix a11 element is 1.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a1e1cbae395589c3ba819a3885ce2f06.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")