Let \( \alpha, \beta \) be two roots of the equation \( \mathrm{P} ...

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Let \( \alpha, \beta \) be two roots of the equation
\( \mathrm{P} \) \( x^{2}+(20)^{1 / 4} x+(5)^{1 / 2}=0 \). Then \( \alpha^{8}+\beta^{8} \) is equal to

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(1) 10
(2) 100
(3) 50
(4) 160
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