1. Suppose 
and 
. Compute the following if possible, or state the reason why the operation could not be performed.
3.
136.130: Test #320 minutes
Name:_____________________ Student Number: _______
1. Suppose and . Compute the following if possible, or state the reason why the operation could not be performed.
(a) 
(b) 
(c) 
(d) 
can not be done since the number of columns in B (4) is not the same as the number of rows in A (2).
2. Find the inverse of the matrix A or show it does not exist.
(a) 
.
(b) 
And since we will not get the identity matrix to the right of the vertical line (since the last row is zero), the matrix is not invertible.