Oblicz wartości wyrażeń:a) log3 45 - log3 15 =b) log27 0,75 + 2log27 2/3 =
a) log3 45 - log 3 15 = log3 45/15= log3 3 = 1
b) log27 0,75+ 2log27 2/3= log27 3/4 + log27 (2/3)^2= log27 3/4 + log 27 4/9= log27 (3/4*4/9) = log 27 1/3 = -1/3
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a) log3 45 - log 3 15 = log3 45/15= log3 3 = 1
b) log27 0,75+ 2log27 2/3= log27 3/4 + log27 (2/3)^2= log27 3/4 + log 27 4/9= log27 (3/4*4/9) = log 27 1/3 = -1/3