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BITSAT Mathematics Matrices 2023 BITSAT 2023 (Memory Based Paper 1)

BITSAT Mathematics Question (2023) — Solution

Question

If A = [ array cc 0 & 2 \\ 3 & -4 array ] and k ~A = [ array cc 0 & 3 a \\ 2 b & 24 array ], then the values of k, a and b respectively are:

Options

  1. A. -6,-12,-18
  2. B. -6,-4,-9
  3. C. -6,4,9
  4. D. -6,12,18

Answer

B. -6,-4,-9

Step-by-step solution

k A= [ array cc 0 & 2 k \\ 3 k & -4 k array ]= [ array cc 0 & 3 a \\ 2 b & 24 array ] k=-6, a=-4 and b=-9

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