Question

∆ = $\left| \begin{matrix} p & 2 - i & i + 1 \\ 2 + i & q & 3 + i \\ 1 - i & 3 - i & r \end{matrix} \right|$is always

• A. Real
• B. Imaginary
• C. Zero
• D. None of these

Answer 1

Answer: (A)

Real

Answer 2

Since ∆ = $\bar{\Delta}$ ⇒ ∆ is purely real.