a)
log4256=4, bo 44=256
log1,21,44=2, bo 1,22=1,44
log0,30,09=2, bo 0,32=0,09
log52(1258)=3, bo (52)3=1258
log2,19,261=3, bo 2,13=9,261
b)
log24(241)=−1, bo 24−1=241
log3(2431)=−5, bo 3−5=2431
log7(3431)=−3, bo 7−3=3431
log4164=−3, bo (41)−3=64
log0,2125=log51125=−3, bo (51)−3=125
c)
log858=51, bo 851=58
log5(55)=log5((5)25)=log5(51)=−21, bo 5−21=55
log3(93)=log3(3)4⋅3=log3(3)5=5, bo (3)5=93
log25(201)=log25((25)21)=−2, bo (25)−2=201
log282=log223⋅221=log22321=321, bo 2321=82