Question

Sabendo que log 2 = 0,3 e log 3 = 0,477 , determine o valor de log 12 e log 5​

Answer 1

$\large\boxed{\begin{array}{l}\rm \ell og12=\ell og2^2\cdot3\\\rm \ell og12=2\ell og2+\ell og3\\\rm \ell og12=2\cdot0,3+0,477\\\rm \ell og12=0,6+0,477\\\rm \ell og12=1,047\\\\\rm \ell og5=\ell og\bigg(\dfrac{10}{2}\bigg)\\\\\rm \ell og5=\ell og10-\ell og2\\\rm \ell og5=1-0,3\\\rm \ell og5=0,7\end{array}}$