MAT2612
ASSIGNMENT 1
Introduction to Discrete Mathematics
FULL SOLUTIONS
COMPLETE SOLUTIONS
MEMORANDUM
UNISA 2026
Page 1 of 10
, SOLUTIONS
Question 1
We are given:
2 5
2 9 0 7 0 3
𝐴=[ ] , 𝐵 = [3 2 ] , 𝐶 = [ ].
3 2 5 8 0 3
9 0
1.1 𝐴 + 𝐵 is not defined because 𝐴 is 2 × 3 and 𝐵 is 3 × 2.
So: Undefined.
1.2 𝐵𝐶: 𝐵 is 3 × 2, 𝐶 is 2 × 3, result is 3 × 3.
Page 2 of 10
ASSIGNMENT 1
Introduction to Discrete Mathematics
FULL SOLUTIONS
COMPLETE SOLUTIONS
MEMORANDUM
UNISA 2026
Page 1 of 10
, SOLUTIONS
Question 1
We are given:
2 5
2 9 0 7 0 3
𝐴=[ ] , 𝐵 = [3 2 ] , 𝐶 = [ ].
3 2 5 8 0 3
9 0
1.1 𝐴 + 𝐵 is not defined because 𝐴 is 2 × 3 and 𝐵 is 3 × 2.
So: Undefined.
1.2 𝐵𝐶: 𝐵 is 3 × 2, 𝐶 is 2 × 3, result is 3 × 3.
Page 2 of 10
