Question 7 of 10
Which product is undefined?
A. CD, where C is a 3 x 1 matrix and D is a 1 x 2 matrix
B. NP, where N is a 2 x 1 matrix and Pis a 1 x 4 matrix
C. AB, where A is a 3 x 2 matrix and Bis a 3 x 1 matrix
D. HK, where H is a 3 x 3 matrix and K is a 3 x 1 matrix

Looking at the product of matrix, note that to multiply the two matrix, the column of the first matrix needs to have the same or equal to the row of the 2nd matrix.

And in this case (propensity), it is not satisfied by the first option because:

C = 3 x 1 and

O= 2 x 1 matrix

In this case CD is therefore undefined.

So we can say that The product that is undefined is known a CD, where C is a 3 x 1 matrix and D is a 1 x 2 matrix.

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Question 7 of 10 Which product is undefined? A. CD, where C is a 3 x 1 matrix and D is a 1 x 2 matrix B. NP, where N is a 2 x 1 matrix and Pis a 1 x 4 matrix C. AB, where A is a 3 x 2 matrix and Bis a 3 x 1 matrix D. HK, where H is a 3 x 3 matrix and K is a 3 x 1 matrix

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Question 7 of 10
Which product is undefined?
A. CD, where C is a 3 x 1 matrix and D is a 1 x 2 matrix
B. NP, where N is a 2 x 1 matrix and Pis a 1 x 4 matrix
C. AB, where A is a 3 x 2 matrix and Bis a 3 x 1 matrix
D. HK, where H is a 3 x 3 matrix and K is a 3 x 1 matrix