\left. \begin{array} { l } { \text { ind the value of } x ^ { 4 } + \f – InterviewSolution

1.	\left. \begin{array} { l } { \text { ind the value of } x ^ { 4 } + \frac { 1 } { x ^ { 4 } } , \text { when } x + \frac { 1 } { x } = 4 } \\ { \text { } 192 \quad ( b ) 294 } \end{array} \right. , \text { when } x + \frac { 1 } { x } = 4
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