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Matrices and Determinants question

2019 · 11 Jan · Shift 1 · Q23

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JEE Main
Mathematics
Matrices and Determinants
2019 · 11 Jan · Shift 1 · Q23

Matrices and Determinants question

2019 · 11 Jan · Shift 1 · Q23

JEE MainMathematicsMatrices and DeterminantsMCQ+4 / −1

Let A =

\left( {\begin{matrix} 0 & {2q} & r \\ p & q & { - r} \\ p & { - q} & r \\ \end{matrix} } \right).

If AAT = I3, then

\left| p \right|

is :

A
${1 \over {\sqrt 2 }}$
B
${1 \over {\sqrt 5 }}$
C
${1 \over {\sqrt 6 }}$
D
${1 \over {\sqrt 3 }}$

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