A) 2
B) \[1/2\]
C) 3
D) none of these
Correct Answer: B
Solution :
The co-ordinates of the point dividing the line joining (-1,1) and (5, 7) in the ratio \[\lambda :1\] are \[\left( \frac{5\lambda -1}{\lambda +1},\frac{7\lambda +1}{\lambda +1} \right)\] This point lies on\[x+y=4.\] Therefore, \[5\lambda -1+7\lambda +1=4\lambda +4\Rightarrow 8\lambda =4\]\[\Rightarrow \]\[\,\lambda =1/2\]You need to login to perform this action.
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