1) 2) если а=7
1)log1/7 (√7=x, (1/7)ˇx=√7, (1/7)ˇx= 7ˇ(1/2), (1/7)ˇx=(1/7)ˇ(-1/2), x=-1/2 2)loga (aˇ3/bˇ7)=loga (aˇ3)-loga(bˇ7)= =3 -log7 (bˇ7)=3-b