Question

Calcule os logaritmos  
a) $log_{2} 8$ 
b) $log_{3} 81$

Answer 1

$log 2 ^8 = x$

$2^x = 8$

$2^x = 2^3$

x = 3


b) $log3^8^1 =x$

$3^x = 3^4$

x = 4

Answer 2

$a) \ log_28=x \rightarrow 2^x=8 \rightarrow x=3\\ \\ b) \ log_381=x \rightarrow 3^x=81 \rightarrow x=4$