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Question

If α,β,γ be the zeroes of the polynomial ax3+bx2+cx+d, then the value of αβ+βγ+γα is-

A
ba
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B
ca
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C
ca
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D
da
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Solution

The correct option is B ca
If α,β,γ are the zeroes of the cubic polynomial ax3+bx2+cx+d, then the sum of the products of zeroes taken two at a time.

That is,

αβ+βγ+γα=coeffiecient\ of xcoefficient\ of x3

αβ+βγ+γα=ca

The correct answer is B.


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