Question

1/3 mũ 2 x 3 mũ 4 x 3 mũ n = 3 mũ 7

giúp mình với

Answer 1

\(\frac{1}{3^2}.3^4.3^n=3^7\)

\(\Rightarrow3^2.3^n=3^7\)

\(\Rightarrow3^n=3^7:3^2\)

\(\Rightarrow3^n=3^5\)

\(\Rightarrow n=5\)

Vậy n = 5

 

Answer 2

(\(\frac{1}{3}\))².3⁴.3ⁿ = 3⁷

\(\Rightarrow\)3².3ⁿ = 3⁷

^{\(\Rightarrow\)}3ⁿ = 3^7:3²

^{\(\Rightarrow\)}3ⁿ = 3⁵

\(\Rightarrow\)n = 5

Vậy n = 5