Question

Tìm số tự nhiên n biết: 2A + 3 =\(^{3^n}\)

Answer 1

\(2A+3=3^n\)

\(\Rightarrow2A=3^n-3\)

\(\Rightarrow A=\frac{3^n-3}{2}\left(n\in N\right)\)

Answer 2

\(2A+3=3^n\)

\(\Rightarrow2A=3^n-3\)

\(\Rightarrow A=\frac{3^3-3}{2}\left(n\in N\right)\)

Answer 3

Ta có:

\(2A+3=3^n\)

\(\Rightarrow2A=3^n-3\)

\(\Rightarrow A=\frac{3^n-3}{2}\)