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Q.

Let a,b,c,p,q  be real numbers. Suppose  α,β are the roots of the equation x2+2px+q=0  and α,1/β are the roots of the equation ax2+2bx+c=0 , where  β2{1,0,1}
Statement-1:  (p2q)0,  (b2ac)0
Statement-2:  bpa or cqa
 

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a

 Statement-1 is true, Statement-2 is true, Statement-2 is a correct explanation for Statement-1 

b

Statement-1is true, Statement-2 is true, Statement-2 is not correct explanation for Statement-1

c

Statement-1 is true, Statement-2 is false

d

Statement-1 is false, Statement-2 is true 

answer is B.

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Detailed Solution

Suppose the roots are imaginary. Then 
 β=α¯ and 1β=α¯β=1ββ2=1
Which is not possible. The roots are real, so 
 (p2q)0,(b2ac)0
Hence, statement 1 is correct.
Also, 2b/a=α+β  and  αβ=c/a,α+β=2p,αβ=q
If  β=1, then
α=qc=qa (which is not possible)
Also, α+1=2ba2p=2bab=ap
 (which is not possible)
Hence, statement 2 is correct, but it is not correct explanation of statement 1
 

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