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If 3x=a+b+c , then the value of (x-a)^3+...

If `3x=a+b+c ,` then the value of `(x-a)^3+\ (x-b)^3+\ (x-c)^3-3\ (x-a)(x-b)(x-c)` is
(a)`a+b+c`
(b) `(a-b)(b-c)(c-a)`
(c)`0`
(d) None of these

A

abc

B

3abc

C

0

D

2abc

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