問題文全文(内容文)：
$∬_D \frac{x}{y \sqrt{1+x^2+y^2}}dxdy$
$D: 0 \leqq x \leqq y $ , $\frac{1}{2} \leqq x^2+y^2 \leqq 1$
$∬_D \frac{x}{y \sqrt{1+x^2+y^2}}dxdy$
$D: 0 \leqq x \leqq y $ , $\frac{1}{2} \leqq x^2+y^2 \leqq 1$
単元：
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/single.php on line 102
Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/single.php on line 103
Warning: usort() expects parameter 1 to be array, bool given in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/single.php on line 102
Warning: Invalid argument supplied for foreach() in /home/kaiketsudb/kaiketsu-db.net/public_html/wp-content/themes/lightning-child-sample/single.php on line 103
指導講師：
ますただ
問題文全文(内容文)：
$∬_D \frac{x}{y \sqrt{1+x^2+y^2}}dxdy$
$D: 0 \leqq x \leqq y $ , $\frac{1}{2} \leqq x^2+y^2 \leqq 1$
$∬_D \frac{x}{y \sqrt{1+x^2+y^2}}dxdy$
$D: 0 \leqq x \leqq y $ , $\frac{1}{2} \leqq x^2+y^2 \leqq 1$
投稿日：2020.11.07