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If a, b, c >0 and if abc=1, then the Val...

If a, b, c >0 and if abc=1, then the Value of a+b+c+ab+bc+ca lies in the interval :

A

`(-oo,-6]`

B

(- 6,0)

C

(0, 6)

D

`[6, oo)`.

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