Question

1 - Seja logx 7 = 20 e logx
5 = 5 . Calculando logx ( 7 / 5 ) , o resultado é :

A ) 1
B ) 2
C ) 3
D ) 4
5 ) 5


Por favor me ajudem !!​

Answer 1

$\boxed{\begin{array}{l}\sf\ell og_x7=20~~\ell og_x5=5\\\sf\ell og_x\bigg(\dfrac{7}{5}\bigg)=\ell og_x7-\ell og_x5\\\sf\ell og_x\bigg(\dfrac{7}{5}\bigg)=20-5=15\\\sf o~gabarito~est\acute a~i ncorreto\end{array}}$