If p, q, r are 3 real numbers satisfying the matrix equation, 341 [ ] 3 2 3 [3 0 1] 202 é ù ê ú = ê ú ê ú ë û pqr then 2p + q – r equals :

Question:

If $p, q, r$ are 3 real numbers satisfying the matrix equation, $[p q r]\left[\begin{array}{lll}3 & 4 & 1 \\ 3 & 2 & 3 \\ 2 & 0 & 2\end{array}\right]=\left[\begin{array}{lll}3 & 0 & 1\end{array}\right]$ then $2 p+q-r$ equals :

  1. $-3$

  2. $-1$

  3. 4

  4. 2


Correct Option: 1

JEE Main Previous Year 1 Question of JEE Main from Mathematics Inverse Trigonometric Functions chapter.
JEE Main Previous Year Online April 22, 2013

Solution:

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