Q166
The inverse of the matrix \[ [ array*20c 2&3&4 \\ 4&3&1 \\ 1&2&4 array ]\] is
The inverse of the matrix \left[ {\begin{array}{*{20}{c}}
2&3&4 \\
4&3&1 \\
1&2&4
\end{array}} \right] is
A.
\left[ {\begin{array}{*{20}{c}}
{10}&{ - 4}&{ - 9} \\
{ - 15}&4&{14} \\
5&{ - 1}&{ - 6}
\end{array}} \right]
B.
\left[ {\begin{array}{*{20}{c}}
{ - 10}&4&9 \\
{15}&{ - 4}&{ - 14} \\
{ - 5}&1&6
\end{array}} \right]
C.
\left[ {\begin{array}{*{20}{c}}
2&{ - \frac{4}{5}}&{ - \frac{9}{5}} \\
{ - 3}&{\frac{4}{5}}&{\frac{{14}}{5}} \\
1&{ - \frac{1}{5}}&{ - \frac{6}{5}}
\end{array}} \right]
D.
\left[ {\begin{array}{*{20}{c}}
{ - 2}&{\frac{4}{5}}&{\frac{9}{5}} \\
3&{ - \frac{4}{5}}&{ - \frac{{14}}{5}} \\
{ - 1}&{\frac{1}{5}}&{\frac{6}{5}}
\end{array}} \right]
AnswerAnswer: Option D
Solution
Answer: Option D
No explanation is given for this question Let's Discuss on Board