Question

А9. Вычислите.......

Answer 1

$frac{lg27}{lg9} + frac{log _{3}125 }{log _{3} 5} = frac{lg3 ^{3} }{lg3 ^{2} } + frac{log _{3}5 ^{3} }{log _{3}5 ^{ frac{1}{2} } } = frac{3lg3}{2lg3} + frac{3log _{3}5 }{ frac{1}{2 }log _{3} 5 } = frac{3}{2} + 6 = 1,5 + 6 = 7,5$