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[JEE Advanced 1998] If $\begin{vmatrix}6i&-3i&1\\4&3i&-1\\20&3&i\end{vmatrix}=x+iy$, then

VAVidaara Admin Asked 1mo ago 1 views 1 answer
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If $\begin{vmatrix}6i&-3i&1\\4&3i&-1\\20&3&i\end{vmatrix}=x+iy$, then

(a) $x=3,y=2$
(b) $x=1,y=3$
(c) $x=0,y=3$
(d) $x=0,y=0$

1 Answer

VAVidaara Admin ✓ Vidaara Team ✓ Accepted · 1mo ago ▲ 0

Correct answer: (d) $x=0,y=0$

Expanding the determinant gives $0$, so $x=0,\ y=0$.

JEE Advanced 1998 · Complex Numbers — verified solution by the Vidaara Team.

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