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Chemická rovnica prípravy dusičnanu-dihydroxid bismutitého z hydroxidu bismutitého.
Z horskej chaty CH1 k horskej chate CH2 vedú 4 turistické cesty, z horskej chaty CH2 vedú k horskej chata CH3 tri turistické cesty. Určte počet spôsobov, ktorými môžeme vybrať trasu z chaty CH1 k…
Koľkými spôsobmi môžeme rozdeliť 9 žiakov na jazykový kurz nemčiny do zahraničia, keď do Rakúska majú ísť 4 žiaci, do Nemecka 3 žiaci a do Švajčiarska 2 žiaci, ak chceme vyhovieť Petrovi, ktorý…
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