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If alpha and beta are roots of the quadr...

If `alpha` and `beta` are roots of the quadratic polynomial f(x) = `p x^2 + qx + r`;then find the value of (i) `alpha^2 + beta^2` (ii) `alpha/beta + beta/alpha` (iii) `1/alpha^3 + 1/beta^3` (iv) `alpha^2/beta + beta^2/alpha`

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