Q7
Which one of the following matrices is the inverse of the matrix \[ [ array*20c 1& - 1 \\ 0&1 array ]?\]
Which one of the following matrices is the inverse of
the matrix \left[ {\begin{array}{*{20}{c}}
1&{ - 1} \\
0&1
\end{array}} \right]?
A.
\left[ {\begin{array}{*{20}{c}}
1&1 \\
{ - 1}&1
\end{array}} \right]
B.
\left[ {\begin{array}{*{20}{c}}
1&0 \\
1&1
\end{array}} \right]
C.
\left[ {\begin{array}{*{20}{c}}
1&1 \\
0&1
\end{array}} \right]
AnswerD.
\left[ {\begin{array}{*{20}{c}}
{ - 1}&1 \\
0&{ - 1}
\end{array}} \right]
Answer: Option C
Solution
Answer: Option C
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