Aratati ca 30×(1/3-0,3)=1

Răspuns :

0,3=3/10
1/3 amplificam cu 10
3/10 amplificam cu 3
=>
10/30
9/30
30×(10/30-9/30)
30×1/30=1

30*(10⁾1/3-3⁾0,3)=1⇒30*(10/30-9/30)=1⇒30*1/30=1⇒1=1