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🌹Topic today：Algebraic Properties of Logarithms对数的代数运算法则
🔑Key words
▶️Logarithm of a product乘积的对数
▶️Logarithm of a quotient商的对数
▶️Logarithm of a power幂的对数
▶️Logarithm of an n-digit positive integer（n为）正整数的对数
▶️common logarithm常用对数
