Question

5 Log 3 по основанию 1/корень5 

Answer 1

  $log_{a^{k}}b=-frac{1}{k}log_{a}b; ; to \\frac{1}{sqrt5}=5^{-frac{1}{2}}\\5log_{frac{1}{sqrt5}}3=5cdot 2log_{5}3=10log_53$