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If alpha, beta ,gamma are roots of x^(3)...

If `alpha, beta ,gamma` are roots of `x^(3) + px^(2) + qx + r = 0 ` then `sum (1)/(alpha^(2))` =

A

`(q^2-2pr)/(r^2)`

B

`q^3-3pqr +3r^2`

C

`(p^2 -2q)/(r^2)`

D

`(pq)/(r ) -3`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-THEORY OF EQUATIONS-EXERCISE-III
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