Question

o valor de log (217,2) - log (21,72) é

Answer 1

$\log 217,2-\log 21,72=\\ \\=\log (10\cdot21,72)-\log 21,72=\\ \\=\log 10 +\log 21,72-\log 21,72=\\ \\=\log 10=\\ \\=1$