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() . , , , , , . . 3.1 ( ). . , () ( = 30 ... 40 ).

, , , .

, , ( ): , , .

. 3.1. ( ), () () , . . ֳ ' . ( | = 0 2 = 0) , (, + 2 = 0 , = 2 ). .

. , , ( ) .

 
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