# Find AB, given shown matrices, If A=begin{bmatrix}2 & 0 &4 end{bmatrix} text{ and } B=begin{bmatrix}1 3 7 end{bmatrix}

Find AB, given shown matrices,
If
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Step 1
Given,

$AB={\left[\begin{array}{ccc}2& 0& 4\end{array}\right]}_{1×3}{\left[\begin{array}{c}1\\ 3\\ 7\end{array}\right]}_{3×1}$
$AB={\left[\begin{array}{c}\left(2×1\right)+\left(0×3\right)+\left(4×7\right)\end{array}\right]}_{1×1}$
$AB={\left[\begin{array}{c}2+0+28\end{array}\right]}_{1×1}$
$AB={\left[\begin{array}{c}30\end{array}\right]}_{1×1}$
Step 2
Therefore,
$AB={\left[\begin{array}{c}30\end{array}\right]}_{1×1}$
Jeffrey Jordon