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OpenStudy (anonymous):
f(x) = -15ln(33x) Compute f '(x), then find the exact value of f ' (4).
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OpenStudy (anonymous):
If f(x) -= ln (u), then f'(x) = du/u The derivative of ln(33x) = 1/(33x) times 33 dx = dx/x So your answer is -15/x Hence, f'(4) = -15/4
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