• 试题 ID 33881


证明:(1)(L) $\int_0^1 \frac{\ln x}{1-x} \mathrm{~d} x=-\frac{\pi^2}{6}$ .
(2)(L) $\int_0^1 \ln \frac{1+x}{1-x} \mathrm{~d} x=2 \ln 2$ .
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