If A= [ array cc 2 & -1 -7 & 4 array ] and B= [ array ll 4 & 1 7 & 2 array ] then B T A T…
Mathematics · JEE Main · NTA Exams — Matrices and Determinants
\(\text { If } A=\left[\begin{array}{cc}
2 & -1 \\
-7 & 4
\end{array}\right] \text { and } B=\left[\begin{array}{ll}
4 & 1 \\
7 & 2
\end{array}\right]\) then BTAT is equal to –
- \(\left[\begin{array}{ll} 1 & 0 \\ 0 & 1 \end{array}\right]\)
- \(\left[\begin{array}{ll} 1 & 1 \\ 1 & 1 \end{array}\right]\)
- \(\left[\begin{array}{ll} 0 & 1 \\ 1 & 0 \end{array}\right]\)
- \(\left[\begin{array}{ll} 1 & 0 \\ 0 & 0 \end{array}\right]\)
Answer
(A) [ array ll 1 & 0 0 & 1 array ]
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