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b) ²log(√8x√2/16) = ²log(√16/16) = ²log¼ = -2
c) ²log16 + ³log27 + 5log1/625
= ²log2⁴ + ³log3³ + 5log5-⁴
= 4 + 3 - 4 = 3
d) ½log9 x ⅓log7 x 49log32
= 2-¹log2^5 x 3-¹log3² x 7²log7
= -5/1 x -2/1 x ½
= 10/2 = 5
e) ⁴log9 x ³log125 x 25log16
= ⁴log4² x ³log3² x 5²log5³
= 2 x 2 x 3/2
= 6
f) ³log27 + 5log1/25 - log0,0001
= ³log3³ + 5log5-² - log 10-⁴
= 3 - 2 -(-4)
= 1 + 4 = 5