Question

log de 1/128 na base 2 

log de raiz 256 na base 4

log de 1/81 na base 3

log de 1000

Answer 1

a)
$\log_2 \frac{1}{128} =x$

$2^x=2^-^7$

x=-7

b)
$\log_ 4 \sqrt{256} =$

$4^x= \sqrt{2^8}$

$2^2^x=2^4$

$2x=4$

$x=4\div2$

x=2

c)
$\log_3 \frac{1}{81} =x$

$3^x=3^-^4$

x=-4

d)
$\log1000=x$

$10^x=10^3$

x=3