Question

Ache x:
a) $32^x = 16$
b) $(\frac{2}{5} )^x = \frac{8}{125}$
c) $8^x = 4$

Answer 1

Resposta:

${32}^{x} = 16 \\ {2}^{5x} = {2}^{4} \\ 5x = 4 \\ x = 4/5 \\ x = 0,8$

$( \frac{2}{5} {)}^{x} = \frac{8}{125} \\ \\ ( \frac{2}{5} {)}^{x} =( \frac{2}{5} {)}^{3} \\ x = 3$

${8}^{x} = 4 \\ {2}^{3x} = {2}^{2} \\ 3x = 2 \\ x = 2/3$

• Espero ter ajudado.