If a, beta are the roots of p * x ^ 2 + qx + r = 0 , then a^ 3 + beta^ 3 =\ (a) (3pqr - q ^ 3)/(p ^ 3) (b) (3pqr - 3q)/(p ^ 3) (c) (pqr - 3q)/(p ^ 3) (d) (3pqr - q)/(p ^ 3)
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The answer will be option a
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