Let X Be Randomly Distributed with Probability Density Function $$f ( x ) = \left\{ \begin{array} { l l } \frac { x ^ { 2 } + 2 x } { 60 } & 2 \leq x \leq 5 \\0 & \text { else }\end{array} \right.$$

Let X be randomly distributed with probability density function $$f ( x ) = \left\{ \begin{array} { l l } \frac { x ^ { 2 } + 2 x } { 60 } & 2 \leq x \leq 5 \\0 & \text { else }\end{array} \right.$$ Find $E \left( \frac { 1 } { x } \right)$