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The common logarithm y = log10 x, for x > 0, has slope function
A(ln 10)/x
B1/(x ln 10)
Cx/ln 10
D1/(10 x)
Answer & Solution
Correct answer: B. 1/(x ln 10)
Since log10 x = ln x / ln 10, the derivative is 1/(x ln 10).
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