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daca P € [MN] SI PM/PN =4/5, CALCULAȚI A) PN/PM B) PN/MN C) MN/PN D) PM/MN

Răspuns :

PN/Pm=5/4 (logic caci e rasturnatul)
PN/MN=PN/MP+PN=5/9
MN/PN=9/5
PM/MN=4/9

Coroana te rog?