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\[\int_0^1\int_0^1 \ln\left(x^\overset{\,}{2}+y^2\right){\rm\,d}x{\rm\,d}y=-\left(3-\frac{\pi}{2}-\ln2\right)\]
\[\int_0^1\int_0^1 \left|\ln\left(x^\overset{\,}{2}+y^2\right)\right|{\rm\,d}x{\rm\,d}y=\pi-3+\ln2\]
青青子衿 发表于 2018-12-13 18:12
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