83

log3 81 =4

log2 16 =4

log0.1 1000 =-3

lg0.001 =-3

log1/8 64=02

log2/316/81=4

84

log 2 5√4=0.4

lg100/√10=1.5

log25 3√5=7/3

log1/7 49√7=-2.5

log 1/6 1/4√36=0.5

85

5²log512=144

8 4log8³=81

7 0.5log7 16=4

9log3 8=64

87

8x=5

x=log8 5

(0.5)x=3

x=log 0.5 3

10-x=6

x=-lg 6