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Určte, čo je množina všetkých bodov v rovine, ktorých súradnice spĺňajú rovnicu: 25x2 +16y2 +100x−96y−444=0. Ďakujem veľmi pekne.
Vedel by mi prosím niekto poradiť s úlohou číslo 3? A zdôvodniť aj prečo. Vopred ďakujem.
Vedel by mi niekto s týmto príkladom prosím pomôcť? Vypočítajte koľko ml 85% H3PO4 potrebujeme na prípravu 25 cm3 jej roztoku s koncentráciou 4 mol/dm3. M(H3PO4)=98g/mol Hustota 83%H3PO4=1,68g/cm3
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