Logarithm Review
Logarithm Review. Definition. log a c = b. a b = c, (a > 0, a ≠ 1). If a = 10, it is called common logarithm. log c = log 10 c. If a = e = 2.718281828459045 ∙ ∙ ∙, it is called n atural l ogarithm. ln c = log e c. Keys on your calculator. Properties of Logarithm. x > 0, y > 0.
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