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Black Book Advanced Problems in MathematicsMathematicsDeterminants

Find the value of for which vmatrix 2a₁+b₁ & 2a₂+b₂ & 2a₃+b₃ 2b₁+c₁ & 2b₂+c₂ & 2b₃+c₃ 2c₁+a₁ & 2c₂+a₂ & 2c₃+a₃ vmatrix = λ vmatrix a₁ & a₂ & a₃ b₁ & b₂ & b₃ c₁ & c₂ & c₃ vmatrix

Correct answer

9

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