What is the coefficient of $x ^ { 4 }$ in the expansion of $\left( x + \frac { 2 } { x } \right) ^ { 8 }$? [3 points] (1) 108 (2) 112 (3) 116 (4) 120 (5) 124
What is the coefficient of $x ^ { 4 }$ in the expansion of $\left( x + \frac { 2 } { x } \right) ^ { 8 }$? [3 points]\\
(1) 108\\
(2) 112\\
(3) 116\\
(4) 120\\
(5) 124