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If α, β are the roots of the quadratic e...

If α, β are the roots of the quadratic equation ax2+bx+c = 0 then which of the following expressions in α, β will denote the symmetric functions of roots. Give proper reasoning. (i)/(α, β) = α2-β (a) (ii) f(α, β) = α2B+ αβ2 (iii) f(α, β) =In 8 (iv) f(α, β) = cos (α-β)

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