4.1.2 Multiplying Matrices − Practice
1. Indicate whether the product is defined. If it is, give the dimensions of the product. A 5 × 3 and B 3 × 4 ; AB
2. Evaluate MN if possible.
= −
1 0 4 3 2 5
− 2 1 0 3 2 1
−
M
N
=
3. Evaluate NM if possible.
4. Find Z 2 if possible.
= −
− 6 3 1 3 1 2 −
1 0 4 3 2 5
Z
− 2 1 0 3 2 1
=
−
M
N
=
5. Evaluate UV if possible.
6. Evaluate P 3 .
−
= −
9 1 0 4 0 2 0 1 5
2
− 1 1 1 1 1 1 1 1 1 −
−
U
V
P
2 1
=
=
197
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