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🌹Topic today：Algebraic Properties of Logarithms對數的代數運算法則
🔑Key words
▶️Logarithm of a product乘積的對數
▶️Logarithm of a quotient商的對數
▶️Logarithm of a power幂的對數
▶️Logarithm of an n-digit positive integer（n為）正整數的對數
▶️common logarithm常用對數
