Mathematics

Mathematics

Problem

∫x1+x4 dx=\int \frac{x}{1+x^4}\,dx = (a) 12cot⁡−1x2+c\frac{1}{2}\cot^{-1} x^2 + c (b) 12tan⁡−1x2+c\frac{1}{2}\tan^{-1} x^2 + c (c) cot⁡−1x2+c\cot^{-1} x^2 + c (d) tan⁡−1x2+c\tan^{-1} x^2 + c (a) 12cot⁡−1x2+c\frac{1}{2}\cot^{-1} x^2 + c (b) 12tan⁡−1x2+c\frac{1}{2}\tan^{-1} x^2 + c (c) cot⁡−1x2+c\cot^{-1} x^2 + c (d) tan⁡−1x2+c\tan^{-1} x^2 + c

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