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JEE Main & Advanced Mathematics Determinants & Matrices Question Bank Mock Test - Matrices

  • question_answer
    If \[A={{[{{a}_{i\,j}}]}_{4\,\times \,4}},\] such that \[{{a}_{ij}}=\left\{ \begin{matrix}    2,\,\,when\,\,\,i=j  \\    0,\,\,when\,\,\,i\ne j  \\ \end{matrix} \right.\] then \[\left\{ \frac{\det (adj(adj\,A))}{7} \right\}\] is (where {.} represents fractional part function) ______.

    Answer:

    1/7


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