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JEE Mains · Maths · STD 12 - 3 and 4 . metrices and determinant
If \(p, q, r\) are \(3\) real numbers satisfying the matrix equation, \([p\,q\,r]\,\left[ {\begin{array}{*{20}{c}}
3&4&1\\
3&2&3\\
2&0&2
\end{array}} \right] = [3\,\,\,0\,\,\,1]\) then \(2p + q - r\) equals
- A \(-3\)
- B \(-1\)
- C \(4\)
- D \(2\)
Answer & Solution
Correct Answer
(A) \(-3\)
Step-by-step Solution
Detailed explanation
Given \(\left[ {\begin{array}{*{20}{c}} p&q&r \end{array}} \right]\left[ {\begin{array}{*{20}{c}} 3&4&1\\ 3&2&3\\ 2&0&2 \end{array}} \right] = \left[ {\begin{array}{*{20}{c}} 3&0&1 \end{array}} \right]\)…
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