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The logarithmic derivative of a function f(x) equals which expression?
Af'(x) ln x
Bf(x)/f'(x)
Cln f'(x)
Df'(x)/f(x)
Answer & Solution
Correct answer: D. f'(x)/f(x)
Differentiating ln f(x) with the chain rule gives f'(x) divided by f(x).
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