The vertices of a triangle are O(0.0), B(-3,-1),C(-1,-3). The equation of the line parallel to BC and intersecting the sides OB and OC whose perpendicular distance from O is 1/2 is
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a
x+y=1/2
b
x+y=-1/2
c
x+y=-1/2
d
x+y=1/2
answer is B.
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Detailed Solution
Line parallel to BC¯ is x+y=k from given data |k|2=12⇒k=−12(∵O,B are opposite sides of the line)