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Question

If α,β and γ are the roots of px3+qx2+r=0, then the value of αββγγαβγγααβγααββγ∣ ∣ ∣
is .

A
rp
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B
qp
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C
0
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D
1
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Solution

The correct option is C 0
For the given equation px3+qx2+r=0,Sum of product of the roots taken two at a time=αβ+βγ+γα=0αββγγαβγγααβγααββγ∣ ∣ ∣C1C1+C2+C3=αβ+βγ+γαβγγααβ+βγ+γαγααβαβ+βγ+γααββγ∣ ∣ ∣=(αβ+βγ+γα) 1βγγα1γααβ1αββγ∣ ∣ ∣=0

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