Question

Considerando log 2=0,3 e log 7=0,85,calcule:log 0.14

Answer 1

Olá!

$\log0,14 = \log14\times10^{-2} \\\\ \log 14 + \log10^{-2} = \log 7 \times 2 + -2\log10 \\\\ \log 7 + \log 2 + -2\log10 = 0,85 + 0,3 -2 = -0,85 \\\\ \log 0,14 = -0,85$

Espero ter ajudado!