Q.
In an Equilateral triangle ex-centre opposite vertex A is (2, -4) and equation of side BC is x+y-2=0. If coordinates of vertex A is α,β then 2α-β
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a
12
b
6
c
-6
d
4
answer is A.
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Detailed Solution
Vertex A is mirror image of excentre about x+y-2=0. α,β is (6,0)
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