The derivative of ln(x^2 + 1) is
A2x/(x^2+1)
B(x^2+1)/2x
C1/(x^2+1)
D2x ln(x^2+1)
Answer & Solution
Correct answer: A. 2x/(x^2+1)
Chain rule: the outer derivative 1/(x^2+1) times the inner derivative 2x.
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