If \( \alpha \) and \( \beta \) are the zeros of the quadratic poly...

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If \( \alpha \) and \( \beta \) are the zeros of the quadratic polynomial \( f(x)=x^{2}-5 x+4 \), find the value of
\[
\frac{1}{\alpha}+\frac{1}{\beta}-2 \alpha \beta \text {. }
\]
(W)
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