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Matrix Multiplication: 1 of 16
In this chapter you will practice computing a matrix product C = A · B by hand, one cell at a time. You will also become familiar with the "AI by Hand" way of arranging matrices, where B is shifted up so its columns line up with C across the top and A's rows line up down the side. This makes C's size easy to see by matching edges, and makes it easy to spot which row and column produce each output value. Each cell is just the dot product of a row from A and a column from B, the move that every later chapter builds on.
The rest of the chapter (Page 21 ~ 31) and the solutions are available to AI by Hand Academy members. You can become a member via a paid Substack subscription.