SOLUTION: If matrix A is an (KxL) matrix and B is an (RxS) The product matrix AB exists if ? And the size of the matrix AB is ?

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Question 1044543: If matrix A is an (KxL) matrix and B is an (RxS)
The product matrix AB exists if ?
And the size of the matrix AB is ?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The product matrix not exist. Number of columns for A must match number of rows for B.

Is it true that L=R? If true, then size of AB will be KxS.