Answer
$\ln\frac{3}{\sqrt {x^2+1}}=\ln3-\frac{1}{2}\ln(x^2+1)$
Work Step by Step
$\ln\frac{3}{\sqrt {x^2+1}}=\ln3-\ln\sqrt {x^2+1}=\ln3-\ln(x^2+1)^{\frac{1}{2}}=\ln3-\frac{1}{2}\ln(x^2+1)$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.