A) 7
B) \[-7\]
C) \[\pm 7\]
D) 0
E) 14
Correct Answer: B
Solution :
Since the given points lies on a line \[\left| \begin{matrix} 1 & 1 & 1 \\ -5 & 5 & 1 \\ 13 & \lambda & 1 \\ \end{matrix} \right|=0\] \[\Rightarrow \]\[1(5-\lambda )-1(-5-13)+1(-5\lambda -65)=0\] \[\Rightarrow \] \[5-\lambda +18-5\lambda -65=0\] \[\Rightarrow \] \[-6\lambda =42\] \[\Rightarrow \] \[\lambda =-7\]You need to login to perform this action.
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