\[\boxed{\text{869.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[a,\ b,\ c,\ d > 0,\ \ a > b,\ \ \]
\[d < b,\ \ c > a\]
\[\frac{1}{d} > \frac{1}{b} > \frac{1}{a} > \frac{1}{c} \Longrightarrow \frac{1}{c} < \frac{1}{a} < \frac{1}{b} < \frac{1}{d}\]