Exercitü si probleme de dificultate medie 2. Efectuați, scriind rezultatul sub formă de putere:
a) (79: (7.712.715); b) (2.27.2) : (27)};
d) [(39) :(3.319; e) (72.712): [(72)31";
c)(58) : (510.5.5);
1) (2.29* : [(2)
Va rog urgent

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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step-by-step explanation:

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