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Let alpha,beta be the roots of the quad...

Let `alpha,beta` be the roots of the quadratic equation `a x^2+b x+c=0a n d=b^2-4a cdotIfalpha+beta,alpha^2+beta^2alpha^3+beta^3` are in G.P. Then a.`=0` b. `!=0` c. `b =0` d. `c =0`

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