Q.

Let   3i^+j^,i^+3j^  and   βi^+(1-β)j^ respectively be the position vectors of the points A, B and C with  respect to the origin O. If the  distance of C from the bisector of the acute angle between OA and OB is 3,2 then the sum of all possible values of β is :

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a

2

b

1

c

3

d

4

answer is D.

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Detailed Solution

Question Image

eq of angular binector is y=x

 dis from (β, 1-β) to y=x

β-+(1-β)1+1=32    2β-1=±3                                               2β=4, -2                                                 β=2, -1    

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