A) \[\Delta \]
B) \[k\Delta \]
C) \[3k\Delta \]
D) \[{{k}^{3}}\Delta \]
Correct Answer: D
Solution :
\[\left| \,\begin{matrix} ka & kb & kc \\ kx & ky & kz \\ kp & kq & kr \\ \end{matrix}\, \right|\,=\,{{k}^{3}}\,\left| \,\begin{matrix} a & b & c \\ x & y & z \\ p & q & r \\ \end{matrix}\, \right|={{k}^{3}}\Delta \].
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