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If x, y, z are complex numbers, and then Δ is
  • a)
    purely real
  • b)
    purely imaginary
  • c)
    complex
  • d)
    0
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
If x, y, z are complex numbers, andthenΔ isa)purely realb)purely...
We have

[Interchanging rows and columns]

[Taking –1 common from each row]
∴  + Δ = 0 ⇒ 2Re(Δ) = 0
∴ Δ is purely imaginary.
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If x, y, z are complex numbers, andthenΔ isa)purely realb)purely imaginaryc)complexd)0Correct answer is option 'B'. Can you explain this answer?
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