PQ = kI, where k ∈ R, k ≠ 0 and I is the identity matrix of order 3. If Q23 = – k/8 and det (Q) = k^2

Let P =
49 , Where ∝  ∈ R, Support Q = [qii] is a matrix such that PQ = kI, where k  ∈ R, k ≠ 0 and I is the identity matrix of order 3. If Q23 = – k/8 and det (Q) = k^2, then-

  1. ∝ = 0, k = 8
  2. 4∝ – k + 8 = 0
  3. det (Padj (Q)) = 2^9
  4.  det (Q adj (P)) = 2^13
Anurag Mishra Professor Asked on 23rd May 2016 in Maths.
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    Answer: b) 4α-k+8=0
    (c) det (Padj(Q))=2^9

    Anurag Mishra Professor Answered on 24th May 2016.
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