Question

Am nevoie de AJUTOR!

Proprietati ale logaritmilor, asa se numeste lectia, daca puteti sa ma ajutati la aceste exercitii :

a) log₄6 + log₄8 - log₄3 ; b) log1 supra 2 3 - log  1 supra 2  12 + log 1 supra 2  2
c) log₀,₁ 5 + log₀,₁4 - log₀,₁2

Si fac pariu ca nimeni nu o sa-mi raspunda :)

Answer 1

a.log[4]6+log[4]8-log[4]3=log[4]6·8/3=log[4]16=log[4]4²=2
b.log[1/2]3-log[1/2]12+log[1/2]2=log[1/2]3·12/2=log[1/2]18=log[1/2]2·9=
log[1/2]2+log[1/2]9=-1+log[1/2]9
c.log[0,1]5+log[0,1]4-log[0,1]2=log[0,1]5·4/2=log[0,1]10=log[0,1]1/10=log[1/10](1/10)^-1=-1
S-a  aplicat  formula  log[a]b+log[a]c=log[a]bc  si
log[a]d-log[a]e=log [a]d/e