If alpha, beta, gamma are the zeros of t...

If `alpha, beta, gamma` are the zeros of the polynomial `f(x) = ax^(3) + bx^(2) + cx + d` then `1/(alpha) + 1/(beta) + 1/(gamma)` = ………….

`1/d`

`1/c`

`c/d`

`-c/d`

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