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Q.

 If p,q,r are negative and distinct, then the determinant Δ=pqrqrprpq is 

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a

>0

b

≤−2

c

≤0

d

0

answer is D.

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Detailed Solution

Δ=−p+q+r −vep2+q2+r2−pq−qr−rp +ve

⇒Δ>0

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