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1 of 8 0-day streak

Decide whether a matrix product is defined and give its order

Question 1 of 8

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Consider the matrices \(P\) and \(N\) shown below

\[P = \begin{bmatrix} 7 & 2 \\ -1 & -2 \\ -5 & 1 \end{bmatrix}\]
\[N = \begin{bmatrix} -3 & 5 \\ 5 & -9 \end{bmatrix}\]
(a)1 mark

Decide whether the product \(PN\) is defined

(b)2 marks

What is the order of \(PN\)?