1.

If \[{{\mathbf{x}}^{\mathbf{2}}}+\frac{1}{{{\mathbf{x}}^{\mathbf{2}}}}=\mathbf{7}\], find the value of \[\left( x+\frac{1}{x} \right)\]

A.  6     
B.  9      
C.  3       
D.  4
Answer» D.  4


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