Solve $5^{2x-1} = 125$.

Solve $5^{2x-1} = 125$.
  1. $1$
  2. $2$
  3. $3$
  4. $\dfrac{1}{2}$

Solution

$125 = 5^{3}$, so $2x - 1 = 3 \Rightarrow x = 2$.

Asked in: IMO

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