Mathematics

Mathematics

Problem

∫dxx(1+(log⁡x)2)\int \frac{dx}{x(1 + (\log x)^2)} equals (1) log⁡(tan⁡−1x)+c\log(\tan^{-1} x) + c (2) log⁡(tan⁡−1x)+tan⁡−1(log⁡x)+c\log(\tan^{-1} x) + \tan^{-1}(\log x) + c (3) tan⁡−1(log⁡(tan⁡−1x))+c\tan^{-1}(\log(\tan^{-1} x)) + c (4) tan⁡−1(log⁡x)+c\tan^{-1}(\log x) + c

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