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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`

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DIPTI PUBLICATION ( AP EAMET)-THEORY OF EQUATIONS-EXERCISE 1A
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