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Q.

If (α,α2)   lies inside the triangle formed by the lines 2x + 3y  1 = 0, x + 2y  3 = 0, 5x  6y  1 = 0, then which of the following is/are CORRECT?

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a

α+2α23<0

b

α+2α23>0

c

6α25α+1>0

d

2α+3α21>0

answer is A, C, D.

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Detailed Solution

Question Image

 

 

 

 

 

 

 

O and the point (α,α2) lie on the opposite sides 
w.r.t  2x+3y1=0 . Hence,
     2α+3α21>0  ……….(i)
O and the point (α,α2)  llie on the same side
     α+2α23<0  ……….(ii)
Again O and the point (α,α2)  lie on the same
side w.r.t.  5x6y1=0. Hence,
5α6α21<0  6α25α+1>0 

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