If A = [1 , ,2 , 3]and B = [ * 20 c - 5 &4&0 0&2& - 1 1& - 3 &2 ]… - Vidyadip

MCQ

If $A = [1\,\,2\,{\rm{ }}3]$and $B = \left[ {\begin{array}{*{20}{c}}{ - 5}&4&0\\0&2&{ - 1}\\1&{ - 3}&2\end{array}} \right]$, then $AB = $

A
$\left[ {\begin{array}{*{20}{c}}{ - 5}&4&0\\0&4&{ - 2}\\3&{ - 9}&6\end{array}} \right]$
B
$\left[ \begin{array}{l}3\\1\\1\end{array} \right]$
✓
$\left[ {\begin{array}{*{20}{c}}{ - 2}&{ - 1}&4\end{array}} \right]$
D
$\left[ {\begin{array}{*{20}{c}}{ - 5}&8&0\\0&4&{ - 3}\\1&{ - 6}&6\end{array}} \right]$

✓

Answer

Correct option: C.

$\left[ {\begin{array}{*{20}{c}}{ - 2}&{ - 1}&4\end{array}} \right]$

c
(c) $AB = [1\,\,2\,\,3]\,\left[ {\begin{array}{*{20}{c}}{ - 5}&4&0\\0&2&{ - 1}\\1&{ - 3}&2\end{array}} \right] = [ - 2\,\, - 1\,\,\,4]$.

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