1.

If \[\mathbf{x=(}\sqrt{\mathbf{2}}\mathbf{+1}{{\mathbf{)}}^{\mathbf{-}\frac{\mathbf{1}}{\mathbf{3}}}}\]the value of \[\left( {{\mathbf{x}}^{\mathbf{3}}}\frac{\mathbf{1}}{{{\mathbf{x}}^{\mathbf{3}}}} \right)\]  is

A.  0                                
B.  \[-\sqrt{2}\]
C.  \[2\sqrt{2}\]
D.  \[3\sqrt{2}\]
Answer» D.  \[3\sqrt{2}\]


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