‰‰K–â‘è

1. ŽŸ‚ÌEuler•û’öŽ®‚ð‰ð‚¯D‚½‚¾‚µ,$x > 0$‚Æ‚·‚éD
\begin{displaymath}\begin{array}{ll}
(a)  x^{2}y^{\prime\prime} + 4xy^{\prime} ...
...ime\prime} + 5xy^{\prime\prime} + 4y^{\prime} = 0 &
\end{array}\end{displaymath}