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2014-04-12T17:07:18+03:00
ΔDFP mas<D=90 ⇒TP ca DP²=FP²-DF²=61²-60²=3721-3600=121  ⇒DP=12
DN_/_ FP ⇒ DN=DF*DP/FP  =60*12/61=720/61  =11,80