[tex]\dfrac{x}{\sqrt{0,25} } = \dfrac{1000}{0,5^{-2}} \implies \dfrac{x}{\sqrt{\dfrac{25}{100} } } = \dfrac{1000}{\bigg(\dfrac{5}{10}\bigg)^{-2} } \implies \dfrac{x}{\sqrt{\dfrac{1}{4} } } = \dfrac{1000}{\bigg(\dfrac{1}{2}\bigg)^{-2} }[/tex]
[tex]\dfrac{x}{\sqrt{\dfrac{1}{2^2} } } = \dfrac{1000}{2^2} \implies \dfrac{x}{\dfrac{1}{2}} = \dfrac{1000}{4} \implies 2x = 250 \implies x = \dfrac{250}{2} \implies x = 125[/tex]
Atunci:
[tex]x^3 = 125^3 = (5^3)^3 = \bf5^9[/tex]
Dacă ai nevoie de un rezultat numeric:
x³ = 1 953 125
