Let `alpha, beta, gamma` are the roots of `f(x)-=ax^(3)+bx^(2)+cx+d=0` . Then the condition for roots of `f(x)=0` are in `G.P` is
(A) `ac^(3)=b^(3)d`
(B) `a^(3)c=bd^(3)`
(C) `ac=bd`
(D) `a^(2)c=b^(2)d`

Let alpha , beta , gamma are the roots of (x)-=ax^(3)+bx^(2)+cx+d=0 Then The condition for roots of f(x)=0 are in G.Pis

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