Question

log de 0,5 na base 2?

Answer 1

$\log_2(0,5)=x\\ \log_2\left( \dfrac{5}{10}\right)=x\\ 2^x= \dfrac{5}{10}\\\\ 2^x= \dfrac{5\div5}{10\div5}\\\\ 2^x= \dfrac{1}{2}\\\\ 2^x= \dfrac{1}{2^1}\\\\ \not2^x=\not2^{-1}\\\\ x=-1$