Question

Să se calculeze folosind proprietățile logaritmilor:

Answer 1

Răspuns:

log15(900)-log15(4)+log4(log3(81))=

=log15(900/4)+log4(log3(3^4))=

=log15(225)+log4(4log3(3))=

=log15(15^2)+log4(4)=

=2log15(15)+1=

=2+1=3

logaA-logaB=loga(A/B)

logaA^n=nlogaA (ex log3(3^4)=4log3(3))

loga(a) =1 (ex log3(3)=1)

logaA=> logaritm in baza a din A

Sper ca intelegii :)))