Khan exercises Maths Tools 1
Let A∈M8×5{\color{blue}A \in M_{8 \times 5}}A∈M8×5 and B∈M2×9{\color{red}B \in M_{2 \times 9}}B∈M2×9. Then the product A⋅B{\color{blue}A} \cdot {\color{red}B}A⋅B is
A∈M8×5{\color{blue}A \in M_{8 \times 5}}A∈M8×5
B∈M2×9{\color{red}B \in M_{2 \times 9}}B∈M2×9
A⋅B{\color{blue}A} \cdot {\color{red}B}A⋅B
5×25 \times 25×2
2×92 \times 92×9
8×58 \times 58×5