1.

Addition of \[\frac{{{a}^{2}}}{2}+\frac{{{b}^{3}}}{3}-\frac{{{c}^{3}}}{4}\], \[\frac{2{{a}^{2}}}{3}+\frac{3{{b}^{3}}}{4}-\frac{4{{c}^{3}}}{4},\] and \[{{a}^{2}}+{{b}^{3}}+{{c}^{3}}\]is ____.

A.    \[\frac{13}{6}a+\frac{25}{12}{{b}^{3}}-\frac{1}{20}{{c}^{3}}\]
B.    \[\frac{13}{6}{{a}^{2}}-\frac{1}{20}{{b}^{3}}+\frac{25}{12}{{c}^{3}}\]
C.    \[\frac{13}{6}{{a}^{2}}+\frac{25}{12}{{b}^{3}}-\frac{1}{20}{{c}^{3}}\]
D.    \[\frac{13}{6}{{a}^{2}}-\frac{25}{12}{{b}^{3}}+\frac{1}{20}{{c}^{3}}\]
Answer» D.    \[\frac{13}{6}{{a}^{2}}-\frac{25}{12}{{b}^{3}}+\frac{1}{20}{{c}^{3}}\]


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