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AJUTATI-MA URGENT! DAU FUNDITA
Calculati:
(2,5) la n = 125 supra 8.


Răspuns :

[tex]2,5^n=\frac{125}{8}[/tex]

[tex](\frac{5}{2})^n=\frac{125}{8}[/tex]

[tex]\frac{5^n}{2^n}=\frac{125}{8}[/tex]

[tex]n=3[/tex]
(2,5)^n=125/8
(25/10)^n = (5)^3/(2)^3
(25/10)^n = (5/2)^3
(25/10) se simplifica cu 5 si avem
(5/2)^n = (5/2)^3
deci n = 3