Question

5ⁿ⁺¹ =125

Tìm số n biết n ϵ N

 

Answer 1

5^{n + 1} = 125

5^{n + 1} = 5³

n + 1 = 3

n = 3 - 1

n = 2

Answer 2

5^n+2=125

5^n+2=5^5

=> n+2=5

=>n     =5-2

    n     =3

Answer 3

\(5^{n+1}=125\)

\(5^{n+1}=5^3\)

\(\Rightarrow n+1=3\)

\(\Rightarrow n=3-1\)

\(\Rightarrow n=2\)

Answer 4

\(5^{n+1}=125\)

\(\Rightarrow5^{n+1}=5^3\)

\(\Rightarrow n+1=3\)

\(\Rightarrow n=3-1=2\)

Vậy : \(n=2\)