Question

Sa se calculeze
log de baza 2 din modul de x = 2

Answer 1

$\log_2 |x|=2\\|x|=2^2\\|x|=4\\x\in \{\pm 4\}$

Answer 2

㏒₂|x|=2 <=> |x|=4 => x=4 sau x=-4 => x∈{-4;4} => S={(-4;4)} .