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= log 10³ + log 5
= 3 + 0,698
= 3,698
b. log x/y = log 100/50 = log 2
= 0,301
c. log x² y = log 100² × 50 = log 500000
= log 5 + log 10⁵
= 0,699 + 5
= 5,699
d. log x²/y = log 100²/50 = log 200
= log 2 + log 10²
= 0,301+ 2
= 2,301