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In the quadratic equation ax^2+bx+c=0,De...

In the quadratic equation `ax^2+bx+c=0,Delta = b^2-4ac and alpha+beta,alpha^2+beta^2,alpha^3+beta^3,` are in G.P , where `alpha,beta` are the roots of `ax^2+bx+c,` then (a) `Delta != 0` (b) `bDelta = 0` (c) `cDelta = 0` (d) `Delta = 0`

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