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结果较怪的广义积分

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青青子衿 Posted 2021-5-4 10:56 |Read mode
Last edited by 青青子衿 2021-5-4 12:13\begin{align*}
I = \int_0^\infty \frac{t^2\ln\!\big|\sin\,\!t\big|\,}{(1+t^2)^2}\mathrm{d}t=\frac{\pi}{4}\left[\frac{2}{e^{2}-1}-2+\ln\left(\frac{e^{2}-1}{2}\right)\right]
\end{align*}

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abababa Posted 2021-5-4 16:21
回复 1# 青青子衿
发网友的解答。屏幕不够大,截图不全,我前面问的是“怎么把|sin x|”的绝对值去掉。
求积分.gif

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