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(), 0,01 α ,
6
a
x ξ.
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2010.
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.
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Oxy :
.
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. 20 .
.
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, x, a t>0,
x.
5
6
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2010.
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y=
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,
, .
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. , . , PH F.
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,
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2N+1 (N=100).
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: a) A;
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