1.

The value of \[\frac{{{\left( {{a}^{2}}-{{b}^{2}} \right)}^{3}}{{\left( {{b}^{2}}-{{c}^{2}} \right)}^{3}}+{{\left( {{c}^{2}}-{{a}^{2}} \right)}^{3}}}{{{\left( a-b \right)}^{3}}+{{\left( b-c \right)}^{3}}+{{\left( c-a \right)}^{3}}}\]is

A.  \[3\left( a+b \right)\left( b+c \right)\left( c+a \right)\]            
B.  \[3\left( a-b \right)\left( b-c \right)\left( c-a \right)\]
C.  \[(a-b)\left( b-c \right)\left( c-a \right)\]             
D.  \[\left( a+b \right)\left( b+c \right)\left( c+a \right)\]
Answer» E.


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