A) \[-4\lambda \] abc
B) \[4{{\lambda }^{2}}\]
C) \[-4{{\lambda }^{2}}\]
D) \[4\lambda \] abc
Correct Answer: B
Solution :
In L.H.S., apply \[{{R}_{2}}\to {{R}_{2}}-{{R}_{3}},\] \[{{\Delta }_{1}}=4{{\lambda }^{3}}\,\left| \begin{matrix} {{a}^{2}} & {{b}^{2}} & {{c}^{2}} \\ a & b & c \\ 1 & 1 & 1 \\ \end{matrix} \right|\] So, on comparing, we get \[k=4{{\lambda }^{2}}\]You need to login to perform this action.
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