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Black Book Advanced Problems in MathematicsMathematicsDeterminants

The determinant vmatrix 2 & a+b+c+d & ab+cd a+b+c+d & 2(a+b)(c+d) & ab(c+d) + cd(a+b) ab+cd & ab(c+d)+cd(a+b) & 2abcd vmatrix = 0 for

Options

  1. Aa + b + c + d = 0
  2. Bab + cd = 0
  3. Cab(c+d) + cd(a+b) = 0
  4. Dany a, b, c, d

Correct answer

D. any a, b, c, d

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