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% 6 C B 7A
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8

%

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x

α

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(α ) +

(α )6 (α ) +

+7A)*
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204

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x


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(α )6 (α )
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+
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s

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=

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+

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6 { rα s + θ 6 x rα s −

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6 { rα s −




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= −{6α | 6

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