જો A = left[ {begin{array}{*{20}{c}}1&2&{ - 1}3&0&{,,2}4&5&{,,0}end{array}} right], B = left[ {begin{array}{*{20}{c}}1&0&02&1&00&1&3end{array}} right], તો AB = . ......

Q: જો $A = \left[ {\begin{array}{*{20}{c}}1&2&{ - 1}\\3&0&{\,\,2}\\4&5&{\,\,0}\end{array}} \right]$, $B = \left[ {\begin{array}{*{20}{c}}1&0&0\\2&1&0\\0&1&3\end{array}} \right],$ તો $AB = \ . ......$

$A = \left[ {\begin{array}{*{20}{c}}1&2&{ - 1}\\3&0&2\\4&5&0\end{array}} \right]$, $B = \left[ {\begin{array}{*{20}{c}}1&0&0\\2&1&0\\0&1&3\end{array}} \right]$ $AB = \left[ {\begin{array}{*{20}{c}}{1 \times 1 + 2 \times 2 + ( - 1)(0)}\\{3 \times 1 + 0 \times 2 + 2 \times 0}\\{4 \times 1 + 5 \times 2 + 0 \times 0}\end{array}} \right. \left. {\begin{array}{*{20}{c}}{1 \times 0 + 2 \times 1 + ( - 1)\,(1)}\\{3 \times 0 + 0 \times 1 + 2 \times 1}\\{4 \times 0 + 5 \times 1 + 0 \times 1}\end{array}\begin{array}{*{20}{c}}{\,\,\,\,1 \times 0 + 2 \times 0 + ( - 1)\,(3)}\\{3 \times 0 + 0 \times 0 + 2 \times 3}\\{4 \times 0 + 5 \times 0 + 0 \times 3}\end{array}} \right]$ $\therefore \,\,AB = \left[ {\begin{array}{*{20}{c}}5&1&{ - 3}\\3&2&6\\{14}&5&0\end{array}} \right]$.

MCQ

ગુજરાતી માધ્યમ

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

A$\left[ {\begin{array}{*{20}{c}}5&1&{ - 3}\\3&2&6\\{14}&5&0\end{array}} \right]$
B$\left[ {\begin{array}{*{20}{c}}{11}&4&3\\1&2&3\\0&3&3\end{array}} \right]$
C$\left[ {\begin{array}{*{20}{c}}1&8&4\\2&9&6\\0&2&0\end{array}} \right]$
D$\left[ {\begin{array}{*{20}{c}}0&1&2\\5&4&3\\1&8&2\end{array}} \right]$

Easy

ધોરણ 12 સાયન્સ
ગણિત
3 and 4 . determinant and metrices
JEE

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