The $G.M.$ of the numbers $3,\,{3^2},\,{3^3},....,\,{3^n}$ is
The $G.M.$ of the numbers $3,\,{3^2},\,{3^3},....,\,{3^n}$ is
- A
${3^{\frac{2}{n}}}$
- B
${3^{\frac{{n + 1}}{2}}}$
- C
${3^{\frac{n}{2}}}$
- D
${3^{\frac{{n - 1}}{2}}}$
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