Practice problem
Let AAA and BBB be matrices. What is the dimension of ABABAB if A2×7A_{2\times7}A2×7 and B7×18B_{7\times18}B7×18?
2×182\times182×18
18×218\times218×2
1×91\times91×9
9×19\times19×1
You can't multiply these matrices.
Type a concept, like “slope” or “photosynthesis”.
