1.

The value of \[{{(x-a)}^{3}}+{{(x-b)}^{3}}+{{(x-c)}^{3}}\]\[-3(x-a)(x-b)(x-c),\]when \[a+b+c=3x\]is ______.

A.  3                                
B.  2        
C.  1                    
D.         0
Answer» E.


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