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NDA2012MathematicsDeterminantsActual

If | array ccc 8 & -5 & 1 5 & x & 1 6 & 3 & 1 array |=2 , then what is the value of x ?

Options

  1. A4
  2. B5
  3. C6
  4. D8

Correct answer

D. 8

Step-by-step solution

aligned & 8(x-3)+5(5-6)+1(15-6 x)=2 & 8 x-24-5+15-6 x=2 & 2 x-14=2 & 2 x=16 x=8 aligned

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