matrix A and matrix B. What is the element in row 2, column 1 of AB?

Question 53

MediumOriginal question

$A = \begin{bmatrix}1 & 2 & 3 \\ 4 & 5 & 6\end{bmatrix}$ and $B = \begin{bmatrix}1 & 0 \\ 2 & 1 \\ 0 & 3\end{bmatrix}$ . What is the element in row 2, column 1 of $AB$ ?

11

Correct answerYour answer

12

Correct answerYour answer

14

Correct answerYour answer

15

Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Worth noting

11 is the element in row 1, column 2: the row and the column were swapped.

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