題組內容
II. (50 points) Fill in the following blanks.
5. The value of $\int0^\infty \int0^\infty \frac{dy dx}{(x^2 + y^2)^2 + 1}$ is __(5)__.
II. (50 points) Fill in the following blanks.
5. The value of $\int0^\infty \int0^\infty \frac{dy dx}{(x^2 + y^2)^2 + 1}$ is __(5)__.