Question

Ajutor la acest exercitiu va rog!

Answer 1

(1-log2 x)(2-log2 x)=0
=>
1-log2 x=0
=>log2 x=1
=>x=2
2-log2 x=0
=>
log2x=2
=>x=4
Soluțiile sunt {2,4}

Answer 2

con existenta x>0
login baza 2din x=1⇒x=2^1=2>0
login baza 2dinx=2⇒x=2²=4>0
S={2'4}
as simple as that!!