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/<----kreska ułamkowa
n=Qdost./Qdost-Qodd /*Qdost-Qodd
n(Qdost-Qodd)=Qdost /:n
Qdost-Qodd=Qdost/n
Qodd=Qdost-Qdost/n
Qodd=(nQdost-Qdost)/n
2z tego samego wyznacz Qdost
n=Qdost./Qdost-Qodd /*Qdost-Qodd
n(Qdost-Qodd)=Qdost
nQdost-nQodd=Qdost
nQdost-Qdost =nQodd
Qdost(n-1)=nQodd
Qdost=nQodd/(n-1)