log1/2a=log₂a/log₂0,5=2*log₂a;
log8a= log₂a/log₂8=log₂a/3,
log1/4a = log₂a/log₂1/4=-2* log₂a,
log√2a= log₂a/log₂√2=0,5*log₂a;
log3a=log₂a/log₂3
