Question

Y×Y×Y mai mic sau egal cu 60000?Cât este Y?

Answer 1

y×y×y ≤ 60000

40×40×40 = 1600×40 = 64000 ≤ 60000 (F) ⇔ y≠40

39×39×39 = 1521×39 = 59319 ≤ 60000 (A) ⇔ y=39

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0×0×0 = 0×0 = 0 ≤ 60000 (A) ⇔ y=0

⇒ y ∈ {0; 1; 2; ...; 38; 39}

Sper ca te-am ajutat! :)