Răspuns:
Simplificam logaritmi:
[tex]a=4*log5(2)+log5^-^1(2^2)=4log5(2)-2log5(2)=2log5(2)[/tex]
[tex]b=log25(16)=log5^2(2^4)=2log5(2)[/tex]
[tex]=> a=b[/tex]
