1.

\[\int_{{}}^{{}}{{{\left( x+\frac{1}{x} \right)}^{3}}}dx=\]

A.            \[\frac{1}{4}{{\left( x+\frac{1}{x} \right)}^{4}}+c\]                     
B.            \[\frac{{{x}^{4}}}{4}+\frac{3{{x}^{2}}}{2}+3\log x-\frac{1}{2{{x}^{2}}}+c\]
C.            \[\frac{{{x}^{4}}}{4}+\frac{3{{x}^{2}}}{2}+3\log x+\frac{1}{{{x}^{2}}}+c\]
D.            None of these
Answer» C.            \[\frac{{{x}^{4}}}{4}+\frac{3{{x}^{2}}}{2}+3\log x+\frac{1}{{{x}^{2}}}+c\]


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