Question

log5 (40) - log 25 (64) =

большое спасибо.

Answer 1

$log_{5}(40) - log_{25}(64) = log_{5}(40) - log_{5^{2}}(8^{2}) = log_{5}(40) - log_{5}(8) = log_{5}(\frac{40}{8}) = log_{5}(5) = 1$