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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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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