Question

Помогите решит (lg64-lg125)/(2-3lg5)

Answer 1

$dfrac{lg64 - lg125}{2-3lg5} = dfrac{lg frac{64}{125} }{lg frac{100}{125} } = dfrac{lg (frac{4}{5})^3 }{lg frac{4}{5} } = dfrac{3 lg frac{4}{5} }{lg frac{4}{5} } = 3$