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If `alpha` and `beta` are the zeros of the polynomial `f(x)=x^2+p x+q` , then a polynomial having `1/alpha` and `1/beta` is its zeros is (a) `x^2+q x+p` (b) `x^2-p x+q` (c) `q x^2+p x+1` (d) `p x^2+q x+1`

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