Solve $3^{x+2} = 243$.

Solve $3^{x+2} = 243$.
  1. $1$
  2. $3$
  3. $5$
  4. $4$

Solution

$243 = 3^{5}$, so $x + 2 = 5 \Rightarrow x = 3$.

Asked in: IMO

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