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If the roots of equation `x^3+a x^2+b=0a r ealpha_1,alpha_2` and `alpha_3(a ,b!=0)` , then find the equation whose roots are `(alpha_1alpha_2+alpha_2alpha_3)/(alpha_1alpha_2alpha_3),(alpha_2alpha_3+alpha_3alpha_1)/(alpha_1alpha_2alpha_3),(alpha_1alpha_3+alpha_1alpha_2)/(alpha_1alpha_2alpha_3)`

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