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If alpha,beta,gamma,delta are the roots ...

If `alpha,beta,gamma,delta` are the roots of `x^(4)+p_(1)x^(3)+p_(2)x^(2)+p_(3)x+p_(4)=0`. Then sum of the products of roots taken two at a time `" "A)``qquad alpha beta+alpha gamma+alpha delta+beta gamma+beta delta+gamma delta=p_(1)``" "B)``alpha beta+alpha gamma+alpha delta+beta gamma+beta delta+gamma delta,=p_(2)``" "C)``alpha beta+alpha gamma+alpha delta+beta gamma+beta delta+gamma delta,=p_(3)``" "D)``alpha beta+alpha gamma+alpha delta+beta gamma+beta delta+gamma delta=p_(4)`

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